Home / 15,755.16-21,741.30-8,680.26

Finding the Fourth Proportional to 15,755.16, 21,741.30 and 8,680.26

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Solution

The fourth proportional to 15,755.16, 21,741.30 and 8,680.26 is: 11,978.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,755.16 : 21,741.30 = 8,680.26 : x
  2. Step 2: Convert to fraction form
    15,755.16/21,741.30 = 8,680.26/x
  3. Step 3: Cross multiply
    15,755.16x = 21,741.30 × 8,680.26
  4. Step 4: Simplify right side
    15,755.16x = 188,720,136.74
  5. Step 5: Solve for x
    x = 188,720,136.74/15,755.16
  6. Step 6: Final answer
    x = 11,978.31

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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.