Home / 15,836.31-21,856.41-9,869.85

Finding the Fourth Proportional to 15,836.31, 21,856.41 and 9,869.85

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Solution

The fourth proportional to 15,836.31, 21,856.41 and 9,869.85 is: 13,621.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,836.31 : 21,856.41 = 9,869.85 : x
  2. Step 2: Convert to fraction form
    15,836.31/21,856.41 = 9,869.85/x
  3. Step 3: Cross multiply
    15,836.31x = 21,856.41 × 9,869.85
  4. Step 4: Simplify right side
    15,836.31x = 215,719,488.24
  5. Step 5: Solve for x
    x = 215,719,488.24/15,836.31
  6. Step 6: Final answer
    x = 13,621.83

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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.