Home / 20,540.18-28,345.39-11,108.75

Finding the Fourth Proportional to 20,540.18, 28,345.39 and 11,108.75

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Solution

The fourth proportional to 20,540.18, 28,345.39 and 11,108.75 is: 15,330.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.18 : 28,345.39 = 11,108.75 : x
  2. Step 2: Convert to fraction form
    20,540.18/28,345.39 = 11,108.75/x
  3. Step 3: Cross multiply
    20,540.18x = 28,345.39 × 11,108.75
  4. Step 4: Simplify right side
    20,540.18x = 314,881,744.15
  5. Step 5: Solve for x
    x = 314,881,744.15/20,540.18
  6. Step 6: Final answer
    x = 15,330.04

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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.