Home / 20,661.97-31,024.56-18,217.39

Finding the Fourth Proportional to 20,661.97, 31,024.56 and 18,217.39

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Solution

The fourth proportional to 20,661.97, 31,024.56 and 18,217.39 is: 27,353.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.97 : 31,024.56 = 18,217.39 : x
  2. Step 2: Convert to fraction form
    20,661.97/31,024.56 = 18,217.39/x
  3. Step 3: Cross multiply
    20,661.97x = 31,024.56 × 18,217.39
  4. Step 4: Simplify right side
    20,661.97x = 565,186,509.10
  5. Step 5: Solve for x
    x = 565,186,509.10/20,661.97
  6. Step 6: Final answer
    x = 27,353.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.