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Finding the Fourth Proportional to 38,439, 53,044.35 and 21,442.95

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Solution

The fourth proportional to 38,439, 53,044.35 and 21,442.95 is: 29,590.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,439 : 53,044.35 = 21,442.95 : x
  2. Step 2: Convert to fraction form
    38,439/53,044.35 = 21,442.95/x
  3. Step 3: Cross multiply
    38,439x = 53,044.35 × 21,442.95
  4. Step 4: Simplify right side
    38,439x = 1,137,427,344.83
  5. Step 5: Solve for x
    x = 1,137,427,344.83/38,439
  6. Step 6: Final answer
    x = 29,590.45

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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.