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Finding the Fourth Proportional to 15,013.82, 20,719.33 and 8,726.20

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Solution

The fourth proportional to 15,013.82, 20,719.33 and 8,726.20 is: 12,042.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,013.82 : 20,719.33 = 8,726.20 : x
  2. Step 2: Convert to fraction form
    15,013.82/20,719.33 = 8,726.20/x
  3. Step 3: Cross multiply
    15,013.82x = 20,719.33 × 8,726.20
  4. Step 4: Simplify right side
    15,013.82x = 180,800,943.83
  5. Step 5: Solve for x
    x = 180,800,943.83/15,013.82
  6. Step 6: Final answer
    x = 12,042.30

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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.