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Finding the Fourth Proportional to 39,472.64, 54,472.12 and 21,567.79

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Solution

The fourth proportional to 39,472.64, 54,472.12 and 21,567.79 is: 29,763.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,472.64 : 54,472.12 = 21,567.79 : x
  2. Step 2: Convert to fraction form
    39,472.64/54,472.12 = 21,567.79/x
  3. Step 3: Cross multiply
    39,472.64x = 54,472.12 × 21,567.79
  4. Step 4: Simplify right side
    39,472.64x = 1,174,843,473.05
  5. Step 5: Solve for x
    x = 1,174,843,473.05/39,472.64
  6. Step 6: Final answer
    x = 29,763.49

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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.