Home / 15,034.10-20,745.18-8,318.78

Finding the Fourth Proportional to 15,034.10, 20,745.18 and 8,318.78

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Solution

The fourth proportional to 15,034.10, 20,745.18 and 8,318.78 is: 11,478.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,034.10 : 20,745.18 = 8,318.78 : x
  2. Step 2: Convert to fraction form
    15,034.10/20,745.18 = 8,318.78/x
  3. Step 3: Cross multiply
    15,034.10x = 20,745.18 × 8,318.78
  4. Step 4: Simplify right side
    15,034.10x = 172,574,588.48
  5. Step 5: Solve for x
    x = 172,574,588.48/15,034.10
  6. Step 6: Final answer
    x = 11,478.88

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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.