Home / 15,486.28-21,371.61-8,772.10

Finding the Fourth Proportional to 15,486.28, 21,371.61 and 8,772.10

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Solution

The fourth proportional to 15,486.28, 21,371.61 and 8,772.10 is: 12,105.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.28 : 21,371.61 = 8,772.10 : x
  2. Step 2: Convert to fraction form
    15,486.28/21,371.61 = 8,772.10/x
  3. Step 3: Cross multiply
    15,486.28x = 21,371.61 × 8,772.10
  4. Step 4: Simplify right side
    15,486.28x = 187,473,900.08
  5. Step 5: Solve for x
    x = 187,473,900.08/15,486.28
  6. Step 6: Final answer
    x = 12,105.81

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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.