Home / 15,129.48-20,872.17-8,665.68

Finding the Fourth Proportional to 15,129.48, 20,872.17 and 8,665.68

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Solution

The fourth proportional to 15,129.48, 20,872.17 and 8,665.68 is: 11,954.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.48 : 20,872.17 = 8,665.68 : x
  2. Step 2: Convert to fraction form
    15,129.48/20,872.17 = 8,665.68/x
  3. Step 3: Cross multiply
    15,129.48x = 20,872.17 × 8,665.68
  4. Step 4: Simplify right side
    15,129.48x = 180,871,546.13
  5. Step 5: Solve for x
    x = 180,871,546.13/15,129.48
  6. Step 6: Final answer
    x = 11,954.91

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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.