Home / 20,311.42-28,031.19-11,359.76

Finding the Fourth Proportional to 20,311.42, 28,031.19 and 11,359.76

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Solution

The fourth proportional to 20,311.42, 28,031.19 and 11,359.76 is: 15,677.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.42 : 28,031.19 = 11,359.76 : x
  2. Step 2: Convert to fraction form
    20,311.42/28,031.19 = 11,359.76/x
  3. Step 3: Cross multiply
    20,311.42x = 28,031.19 × 11,359.76
  4. Step 4: Simplify right side
    20,311.42x = 318,427,479.53
  5. Step 5: Solve for x
    x = 318,427,479.53/20,311.42
  6. Step 6: Final answer
    x = 15,677.26

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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.