Home / 20,543.72-28,350.30-11,591.20

Finding the Fourth Proportional to 20,543.72, 28,350.30 and 11,591.20

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Solution

The fourth proportional to 20,543.72, 28,350.30 and 11,591.20 is: 15,995.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.72 : 28,350.30 = 11,591.20 : x
  2. Step 2: Convert to fraction form
    20,543.72/28,350.30 = 11,591.20/x
  3. Step 3: Cross multiply
    20,543.72x = 28,350.30 × 11,591.20
  4. Step 4: Simplify right side
    20,543.72x = 328,613,997.36
  5. Step 5: Solve for x
    x = 328,613,997.36/20,543.72
  6. Step 6: Final answer
    x = 15,995.84

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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.