Home / 15,781.44-21,778.38-10,116.18

Finding the Fourth Proportional to 15,781.44, 21,778.38 and 10,116.18

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Solution

The fourth proportional to 15,781.44, 21,778.38 and 10,116.18 is: 13,960.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.44 : 21,778.38 = 10,116.18 : x
  2. Step 2: Convert to fraction form
    15,781.44/21,778.38 = 10,116.18/x
  3. Step 3: Cross multiply
    15,781.44x = 21,778.38 × 10,116.18
  4. Step 4: Simplify right side
    15,781.44x = 220,314,069.59
  5. Step 5: Solve for x
    x = 220,314,069.59/15,781.44
  6. Step 6: Final answer
    x = 13,960.33

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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.