Home / 20,776.38-28,671.35-11,344.88

Finding the Fourth Proportional to 20,776.38, 28,671.35 and 11,344.88

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Solution

The fourth proportional to 20,776.38, 28,671.35 and 11,344.88 is: 15,655.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.38 : 28,671.35 = 11,344.88 : x
  2. Step 2: Convert to fraction form
    20,776.38/28,671.35 = 11,344.88/x
  3. Step 3: Cross multiply
    20,776.38x = 28,671.35 × 11,344.88
  4. Step 4: Simplify right side
    20,776.38x = 325,272,825.11
  5. Step 5: Solve for x
    x = 325,272,825.11/20,776.38
  6. Step 6: Final answer
    x = 15,655.90

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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.