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Finding the Fourth Proportional to 39,474.92, 54,473.90 and 21,569.78

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Solution

The fourth proportional to 39,474.92, 54,473.90 and 21,569.78 is: 29,765.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,474.92 : 54,473.90 = 21,569.78 : x
  2. Step 2: Convert to fraction form
    39,474.92/54,473.90 = 21,569.78/x
  3. Step 3: Cross multiply
    39,474.92x = 54,473.90 × 21,569.78
  4. Step 4: Simplify right side
    39,474.92x = 1,174,990,038.74
  5. Step 5: Solve for x
    x = 1,174,990,038.74/39,474.92
  6. Step 6: Final answer
    x = 29,765.48

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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.