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Finding the Fourth Proportional to 18,284.58, 25,221.20 and 12,609.63

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Solution

The fourth proportional to 18,284.58, 25,221.20 and 12,609.63 is: 17,393.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,284.58 : 25,221.20 = 12,609.63 : x
  2. Step 2: Convert to fraction form
    18,284.58/25,221.20 = 12,609.63/x
  3. Step 3: Cross multiply
    18,284.58x = 25,221.20 × 12,609.63
  4. Step 4: Simplify right side
    18,284.58x = 318,029,937.11
  5. Step 5: Solve for x
    x = 318,029,937.11/18,284.58
  6. Step 6: Final answer
    x = 17,393.34

Related Problems

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Half scale
Find fourth proportional to 36,569.16, 50,442.39 and 25,219.26
Double scale
Find fourth proportional to 18,285.58, 25,222.57 and 12,610.63
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.