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Finding the Fourth Proportional to 15,773.60, 23,660.40 and 13,428.20

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Solution

The fourth proportional to 15,773.60, 23,660.40 and 13,428.20 is: 20,142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,773.60 : 23,660.40 = 13,428.20 : x
  2. Step 2: Convert to fraction form
    15,773.60/23,660.40 = 13,428.20/x
  3. Step 3: Cross multiply
    15,773.60x = 23,660.40 × 13,428.20
  4. Step 4: Simplify right side
    15,773.60x = 317,716,583.28
  5. Step 5: Solve for x
    x = 317,716,583.28/15,773.60
  6. Step 6: Final answer
    x = 20,142.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.