Home / 38,517.61-53,156.77-21,521.90

Finding the Fourth Proportional to 38,517.61, 53,156.77 and 21,521.90

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Solution

The fourth proportional to 38,517.61, 53,156.77 and 21,521.90 is: 29,701.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,517.61 : 53,156.77 = 21,521.90 : x
  2. Step 2: Convert to fraction form
    38,517.61/53,156.77 = 21,521.90/x
  3. Step 3: Cross multiply
    38,517.61x = 53,156.77 × 21,521.90
  4. Step 4: Simplify right side
    38,517.61x = 1,144,034,888.41
  5. Step 5: Solve for x
    x = 1,144,034,888.41/38,517.61
  6. Step 6: Final answer
    x = 29,701.61

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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.