Home / 20,549.89-28,358.80-11,118.43

Finding the Fourth Proportional to 20,549.89, 28,358.80 and 11,118.43

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Solution

The fourth proportional to 20,549.89, 28,358.80 and 11,118.43 is: 15,343.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,549.89 : 28,358.80 = 11,118.43 : x
  2. Step 2: Convert to fraction form
    20,549.89/28,358.80 = 11,118.43/x
  3. Step 3: Cross multiply
    20,549.89x = 28,358.80 × 11,118.43
  4. Step 4: Simplify right side
    20,549.89x = 315,305,332.68
  5. Step 5: Solve for x
    x = 315,305,332.68/20,549.89
  6. Step 6: Final answer
    x = 15,343.41

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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.