Home / 20,064.78-27,689.45-11,112.66

Finding the Fourth Proportional to 20,064.78, 27,689.45 and 11,112.66

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Solution

The fourth proportional to 20,064.78, 27,689.45 and 11,112.66 is: 15,335.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,064.78 : 27,689.45 = 11,112.66 : x
  2. Step 2: Convert to fraction form
    20,064.78/27,689.45 = 11,112.66/x
  3. Step 3: Cross multiply
    20,064.78x = 27,689.45 × 11,112.66
  4. Step 4: Simplify right side
    20,064.78x = 307,703,387.87
  5. Step 5: Solve for x
    x = 307,703,387.87/20,064.78
  6. Step 6: Final answer
    x = 15,335.50

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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.