Home / 20,543.66-28,350.18-11,112.20

Finding the Fourth Proportional to 20,543.66, 28,350.18 and 11,112.20

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Solution

The fourth proportional to 20,543.66, 28,350.18 and 11,112.20 is: 15,334.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.66 : 28,350.18 = 11,112.20 : x
  2. Step 2: Convert to fraction form
    20,543.66/28,350.18 = 11,112.20/x
  3. Step 3: Cross multiply
    20,543.66x = 28,350.18 × 11,112.20
  4. Step 4: Simplify right side
    20,543.66x = 315,032,728.45
  5. Step 5: Solve for x
    x = 315,032,728.45/20,543.66
  6. Step 6: Final answer
    x = 15,334.79

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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.