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Finding the Fourth Proportional to 18,478.58, 25,500.44 and 9,980.70

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Solution

The fourth proportional to 18,478.58, 25,500.44 and 9,980.70 is: 13,773.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.58 : 25,500.44 = 9,980.70 : x
  2. Step 2: Convert to fraction form
    18,478.58/25,500.44 = 9,980.70/x
  3. Step 3: Cross multiply
    18,478.58x = 25,500.44 × 9,980.70
  4. Step 4: Simplify right side
    18,478.58x = 254,512,191.60
  5. Step 5: Solve for x
    x = 254,512,191.60/18,478.58
  6. Step 6: Final answer
    x = 13,773.36

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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.