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Finding the Fourth Proportional to 38,992.80, 53,810.02 and 21,087.85

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Solution

The fourth proportional to 38,992.80, 53,810.02 and 21,087.85 is: 29,101.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,992.80 : 53,810.02 = 21,087.85 : x
  2. Step 2: Convert to fraction form
    38,992.80/53,810.02 = 21,087.85/x
  3. Step 3: Cross multiply
    38,992.80x = 53,810.02 × 21,087.85
  4. Step 4: Simplify right side
    38,992.80x = 1,134,737,630.26
  5. Step 5: Solve for x
    x = 1,134,737,630.26/38,992.80
  6. Step 6: Final answer
    x = 29,101.21

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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.