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Finding the Fourth Proportional to 29,690.40, 40,939.92 and 20,264.16

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Solution

The fourth proportional to 29,690.40, 40,939.92 and 20,264.16 is: 27,942.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,690.40 : 40,939.92 = 20,264.16 : x
  2. Step 2: Convert to fraction form
    29,690.40/40,939.92 = 20,264.16/x
  3. Step 3: Cross multiply
    29,690.40x = 40,939.92 × 20,264.16
  4. Step 4: Simplify right side
    29,690.40x = 829,613,089.27
  5. Step 5: Solve for x
    x = 829,613,089.27/29,690.40
  6. Step 6: Final answer
    x = 27,942.13

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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.