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Finding the Fourth Proportional to 39,393.86, 54,363.88 and 21,488.95

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Solution

The fourth proportional to 39,393.86, 54,363.88 and 21,488.95 is: 29,654.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,393.86 : 54,363.88 = 21,488.95 : x
  2. Step 2: Convert to fraction form
    39,393.86/54,363.88 = 21,488.95/x
  3. Step 3: Cross multiply
    39,393.86x = 54,363.88 × 21,488.95
  4. Step 4: Simplify right side
    39,393.86x = 1,168,222,319.86
  5. Step 5: Solve for x
    x = 1,168,222,319.86/39,393.86
  6. Step 6: Final answer
    x = 29,654.93

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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.