Home / 39,781.30-54,898.32-21,877.42

Finding the Fourth Proportional to 39,781.30, 54,898.32 and 21,877.42

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Solution

The fourth proportional to 39,781.30, 54,898.32 and 21,877.42 is: 30,190.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.30 : 54,898.32 = 21,877.42 : x
  2. Step 2: Convert to fraction form
    39,781.30/54,898.32 = 21,877.42/x
  3. Step 3: Cross multiply
    39,781.30x = 54,898.32 × 21,877.42
  4. Step 4: Simplify right side
    39,781.30x = 1,201,033,603.93
  5. Step 5: Solve for x
    x = 1,201,033,603.93/39,781.30
  6. Step 6: Final answer
    x = 30,190.91

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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.