Home / 39,412.20-54,387.81-21,507.42

Finding the Fourth Proportional to 39,412.20, 54,387.81 and 21,507.42

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Solution

The fourth proportional to 39,412.20, 54,387.81 and 21,507.42 is: 29,679.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,412.20 : 54,387.81 = 21,507.42 : x
  2. Step 2: Convert to fraction form
    39,412.20/54,387.81 = 21,507.42/x
  3. Step 3: Cross multiply
    39,412.20x = 54,387.81 × 21,507.42
  4. Step 4: Simplify right side
    39,412.20x = 1,169,741,472.55
  5. Step 5: Solve for x
    x = 1,169,741,472.55/39,412.20
  6. Step 6: Final answer
    x = 29,679.68

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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.