Home / 21,733.90-29,999.91-12,780.97

Finding the Fourth Proportional to 21,733.90, 29,999.91 and 12,780.97

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Solution

The fourth proportional to 21,733.90, 29,999.91 and 12,780.97 is: 17,641.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,733.90 : 29,999.91 = 12,780.97 : x
  2. Step 2: Convert to fraction form
    21,733.90/29,999.91 = 12,780.97/x
  3. Step 3: Cross multiply
    21,733.90x = 29,999.91 × 12,780.97
  4. Step 4: Simplify right side
    21,733.90x = 383,427,949.71
  5. Step 5: Solve for x
    x = 383,427,949.71/21,733.90
  6. Step 6: Final answer
    x = 17,641.93

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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.