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Finding the Fourth Proportional to 29,689.71, 40,956.91 and 17,749.90

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Solution

The fourth proportional to 29,689.71, 40,956.91 and 17,749.90 is: 24,485.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,689.71 : 40,956.91 = 17,749.90 : x
  2. Step 2: Convert to fraction form
    29,689.71/40,956.91 = 17,749.90/x
  3. Step 3: Cross multiply
    29,689.71x = 40,956.91 × 17,749.90
  4. Step 4: Simplify right side
    29,689.71x = 726,981,056.81
  5. Step 5: Solve for x
    x = 726,981,056.81/29,689.71
  6. Step 6: Final answer
    x = 24,485.96

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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.