Home / 15,765.32-21,757.08-8,691.70

Finding the Fourth Proportional to 15,765.32, 21,757.08 and 8,691.70

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Solution

The fourth proportional to 15,765.32, 21,757.08 and 8,691.70 is: 11,995.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765.32 : 21,757.08 = 8,691.70 : x
  2. Step 2: Convert to fraction form
    15,765.32/21,757.08 = 8,691.70/x
  3. Step 3: Cross multiply
    15,765.32x = 21,757.08 × 8,691.70
  4. Step 4: Simplify right side
    15,765.32x = 189,106,012.24
  5. Step 5: Solve for x
    x = 189,106,012.24/15,765.32
  6. Step 6: Final answer
    x = 11,995.06

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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.