Home / 20,760.17-28,649.12-11,328.74

Finding the Fourth Proportional to 20,760.17, 28,649.12 and 11,328.74

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Solution

The fourth proportional to 20,760.17, 28,649.12 and 11,328.74 is: 15,633.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.17 : 28,649.12 = 11,328.74 : x
  2. Step 2: Convert to fraction form
    20,760.17/28,649.12 = 11,328.74/x
  3. Step 3: Cross multiply
    20,760.17x = 28,649.12 × 11,328.74
  4. Step 4: Simplify right side
    20,760.17x = 324,558,310.11
  5. Step 5: Solve for x
    x = 324,558,310.11/20,760.17
  6. Step 6: Final answer
    x = 15,633.70

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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.