Home / 39,658.92-54,728.30-21,508.64

Finding the Fourth Proportional to 39,658.92, 54,728.30 and 21,508.64

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Solution

The fourth proportional to 39,658.92, 54,728.30 and 21,508.64 is: 29,681.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,658.92 : 54,728.30 = 21,508.64 : x
  2. Step 2: Convert to fraction form
    39,658.92/54,728.30 = 21,508.64/x
  3. Step 3: Cross multiply
    39,658.92x = 54,728.30 × 21,508.64
  4. Step 4: Simplify right side
    39,658.92x = 1,177,131,302.51
  5. Step 5: Solve for x
    x = 1,177,131,302.51/39,658.92
  6. Step 6: Final answer
    x = 29,681.38

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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.