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Finding the Fourth Proportional to 38,761.98, 53,487.12 and 21,763.95

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Solution

The fourth proportional to 38,761.98, 53,487.12 and 21,763.95 is: 30,031.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,761.98 : 53,487.12 = 21,763.95 : x
  2. Step 2: Convert to fraction form
    38,761.98/53,487.12 = 21,763.95/x
  3. Step 3: Cross multiply
    38,761.98x = 53,487.12 × 21,763.95
  4. Step 4: Simplify right side
    38,761.98x = 1,164,091,005.32
  5. Step 5: Solve for x
    x = 1,164,091,005.32/38,761.98
  6. Step 6: Final answer
    x = 30,031.77

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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.