Home / 20,540.26-28,345.56-11,108.82

Finding the Fourth Proportional to 20,540.26, 28,345.56 and 11,108.82

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Solution

The fourth proportional to 20,540.26, 28,345.56 and 11,108.82 is: 15,330.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.26 : 28,345.56 = 11,108.82 : x
  2. Step 2: Convert to fraction form
    20,540.26/28,345.56 = 11,108.82/x
  3. Step 3: Cross multiply
    20,540.26x = 28,345.56 × 11,108.82
  4. Step 4: Simplify right side
    20,540.26x = 314,885,867.12
  5. Step 5: Solve for x
    x = 314,885,867.12/20,540.26
  6. Step 6: Final answer
    x = 15,330.18

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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.