Home / 15,687.70-23,531.55-11,929.30

Finding the Fourth Proportional to 15,687.70, 23,531.55 and 11,929.30

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Solution

The fourth proportional to 15,687.70, 23,531.55 and 11,929.30 is: 17,893.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.70 : 23,531.55 = 11,929.30 : x
  2. Step 2: Convert to fraction form
    15,687.70/23,531.55 = 11,929.30/x
  3. Step 3: Cross multiply
    15,687.70x = 23,531.55 × 11,929.30
  4. Step 4: Simplify right side
    15,687.70x = 280,714,919.42
  5. Step 5: Solve for x
    x = 280,714,919.42/15,687.70
  6. Step 6: Final answer
    x = 17,893.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.