Home / 15,781.83-21,778.91-10,116.57

Finding the Fourth Proportional to 15,781.83, 21,778.91 and 10,116.57

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Solution

The fourth proportional to 15,781.83, 21,778.91 and 10,116.57 is: 13,960.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.83 : 21,778.91 = 10,116.57 : x
  2. Step 2: Convert to fraction form
    15,781.83/21,778.91 = 10,116.57/x
  3. Step 3: Cross multiply
    15,781.83x = 21,778.91 × 10,116.57
  4. Step 4: Simplify right side
    15,781.83x = 220,327,816.96
  5. Step 5: Solve for x
    x = 220,327,816.96/15,781.83
  6. Step 6: Final answer
    x = 13,960.86

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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.