Home / 20,342.75-28,073.79-11,390.17

Finding the Fourth Proportional to 20,342.75, 28,073.79 and 11,390.17

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Solution

The fourth proportional to 20,342.75, 28,073.79 and 11,390.17 is: 15,718.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.75 : 28,073.79 = 11,390.17 : x
  2. Step 2: Convert to fraction form
    20,342.75/28,073.79 = 11,390.17/x
  3. Step 3: Cross multiply
    20,342.75x = 28,073.79 × 11,390.17
  4. Step 4: Simplify right side
    20,342.75x = 319,765,223.10
  5. Step 5: Solve for x
    x = 319,765,223.10/20,342.75
  6. Step 6: Final answer
    x = 15,718.88

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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.