Home / 15,687.44-21,646.36-8,972

Finding the Fourth Proportional to 15,687.44, 21,646.36 and 8,972

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Solution

The fourth proportional to 15,687.44, 21,646.36 and 8,972 is: 12,380.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.44 : 21,646.36 = 8,972 : x
  2. Step 2: Convert to fraction form
    15,687.44/21,646.36 = 8,972/x
  3. Step 3: Cross multiply
    15,687.44x = 21,646.36 × 8,972
  4. Step 4: Simplify right side
    15,687.44x = 194,211,141.92
  5. Step 5: Solve for x
    x = 194,211,141.92/15,687.44
  6. Step 6: Final answer
    x = 12,380.04

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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.