Home / 15,382.61-21,228.28-9,013.78

Finding the Fourth Proportional to 15,382.61, 21,228.28 and 9,013.78

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Solution

The fourth proportional to 15,382.61, 21,228.28 and 9,013.78 is: 12,439.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,382.61 : 21,228.28 = 9,013.78 : x
  2. Step 2: Convert to fraction form
    15,382.61/21,228.28 = 9,013.78/x
  3. Step 3: Cross multiply
    15,382.61x = 21,228.28 × 9,013.78
  4. Step 4: Simplify right side
    15,382.61x = 191,347,049.70
  5. Step 5: Solve for x
    x = 191,347,049.70/15,382.61
  6. Step 6: Final answer
    x = 12,439.18

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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.