Home / 15,753.45-21,739.85-8,680.29

Finding the Fourth Proportional to 15,753.45, 21,739.85 and 8,680.29

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Solution

The fourth proportional to 15,753.45, 21,739.85 and 8,680.29 is: 11,978.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,753.45 : 21,739.85 = 8,680.29 : x
  2. Step 2: Convert to fraction form
    15,753.45/21,739.85 = 8,680.29/x
  3. Step 3: Cross multiply
    15,753.45x = 21,739.85 × 8,680.29
  4. Step 4: Simplify right side
    15,753.45x = 188,708,159.16
  5. Step 5: Solve for x
    x = 188,708,159.16/15,753.45
  6. Step 6: Final answer
    x = 11,978.85

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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.