Home / 20,283.39-27,951.20-15,508.74

Finding the Fourth Proportional to 20,283.39, 27,951.20 and 15,508.74

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Solution

The fourth proportional to 20,283.39, 27,951.20 and 15,508.74 is: 21,371.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,283.39 : 27,951.20 = 15,508.74 : x
  2. Step 2: Convert to fraction form
    20,283.39/27,951.20 = 15,508.74/x
  3. Step 3: Cross multiply
    20,283.39x = 27,951.20 × 15,508.74
  4. Step 4: Simplify right side
    20,283.39x = 433,487,943.92
  5. Step 5: Solve for x
    x = 433,487,943.92/20,283.39
  6. Step 6: Final answer
    x = 21,371.58

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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.