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Finding the Fourth Proportional to 19,428.60, 29,142.90 and 15,200.40

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Solution

The fourth proportional to 19,428.60, 29,142.90 and 15,200.40 is: 22,800.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,428.60 : 29,142.90 = 15,200.40 : x
  2. Step 2: Convert to fraction form
    19,428.60/29,142.90 = 15,200.40/x
  3. Step 3: Cross multiply
    19,428.60x = 29,142.90 × 15,200.40
  4. Step 4: Simplify right side
    19,428.60x = 442,983,737.16
  5. Step 5: Solve for x
    x = 442,983,737.16/19,428.60
  6. Step 6: Final answer
    x = 22,800.60

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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.