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Finding the Fourth Proportional to 19,666.68, 29,475.39 and 15,490.20

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Solution

The fourth proportional to 19,666.68, 29,475.39 and 15,490.20 is: 23,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,666.68 : 29,475.39 = 15,490.20 : x
  2. Step 2: Convert to fraction form
    19,666.68/29,475.39 = 15,490.20/x
  3. Step 3: Cross multiply
    19,666.68x = 29,475.39 × 15,490.20
  4. Step 4: Simplify right side
    19,666.68x = 456,579,686.18
  5. Step 5: Solve for x
    x = 456,579,686.18/19,666.68
  6. Step 6: Final answer
    x = 23,215.90

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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.