Home / 20,543.91-28,350.60-11,112.48

Finding the Fourth Proportional to 20,543.91, 28,350.60 and 11,112.48

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Solution

The fourth proportional to 20,543.91, 28,350.60 and 11,112.48 is: 15,335.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.91 : 28,350.60 = 11,112.48 : x
  2. Step 2: Convert to fraction form
    20,543.91/28,350.60 = 11,112.48/x
  3. Step 3: Cross multiply
    20,543.91x = 28,350.60 × 11,112.48
  4. Step 4: Simplify right side
    20,543.91x = 315,045,475.49
  5. Step 5: Solve for x
    x = 315,045,475.49/20,543.91
  6. Step 6: Final answer
    x = 15,335.22

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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.