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Finding the Fourth Proportional to 19,471.20, 29,239.20 and 10,712.40

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Solution

The fourth proportional to 19,471.20, 29,239.20 and 10,712.40 is: 16,086.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,471.20 : 29,239.20 = 10,712.40 : x
  2. Step 2: Convert to fraction form
    19,471.20/29,239.20 = 10,712.40/x
  3. Step 3: Cross multiply
    19,471.20x = 29,239.20 × 10,712.40
  4. Step 4: Simplify right side
    19,471.20x = 313,222,006.08
  5. Step 5: Solve for x
    x = 313,222,006.08/19,471.20
  6. Step 6: Final answer
    x = 16,086.43

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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.