Home / 20,955.11-28,909.85-11,997.86

Finding the Fourth Proportional to 20,955.11, 28,909.85 and 11,997.86

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Solution

The fourth proportional to 20,955.11, 28,909.85 and 11,997.86 is: 16,552.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.11 : 28,909.85 = 11,997.86 : x
  2. Step 2: Convert to fraction form
    20,955.11/28,909.85 = 11,997.86/x
  3. Step 3: Cross multiply
    20,955.11x = 28,909.85 × 11,997.86
  4. Step 4: Simplify right side
    20,955.11x = 346,856,128.38
  5. Step 5: Solve for x
    x = 346,856,128.38/20,955.11
  6. Step 6: Final answer
    x = 16,552.35

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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.