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Finding the Fourth Proportional to 18,220.68, 25,140.14 and 10,262.90

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Solution

The fourth proportional to 18,220.68, 25,140.14 and 10,262.90 is: 14,160.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.68 : 25,140.14 = 10,262.90 : x
  2. Step 2: Convert to fraction form
    18,220.68/25,140.14 = 10,262.90/x
  3. Step 3: Cross multiply
    18,220.68x = 25,140.14 × 10,262.90
  4. Step 4: Simplify right side
    18,220.68x = 258,010,742.81
  5. Step 5: Solve for x
    x = 258,010,742.81/18,220.68
  6. Step 6: Final answer
    x = 14,160.32

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Half scale
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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.