Home / 39,486-54,490.23-21,580.95

Finding the Fourth Proportional to 39,486, 54,490.23 and 21,580.95

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Solution

The fourth proportional to 39,486, 54,490.23 and 21,580.95 is: 29,781.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,486 : 54,490.23 = 21,580.95 : x
  2. Step 2: Convert to fraction form
    39,486/54,490.23 = 21,580.95/x
  3. Step 3: Cross multiply
    39,486x = 54,490.23 × 21,580.95
  4. Step 4: Simplify right side
    39,486x = 1,175,950,929.12
  5. Step 5: Solve for x
    x = 1,175,950,929.12/39,486
  6. Step 6: Final answer
    x = 29,781.47

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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.