Home / 30,729.92-42,418.76-17,987.13

Finding the Fourth Proportional to 30,729.92, 42,418.76 and 17,987.13

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Solution

The fourth proportional to 30,729.92, 42,418.76 and 17,987.13 is: 24,828.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,729.92 : 42,418.76 = 17,987.13 : x
  2. Step 2: Convert to fraction form
    30,729.92/42,418.76 = 17,987.13/x
  3. Step 3: Cross multiply
    30,729.92x = 42,418.76 × 17,987.13
  4. Step 4: Simplify right side
    30,729.92x = 762,991,660.62
  5. Step 5: Solve for x
    x = 762,991,660.62/30,729.92
  6. Step 6: Final answer
    x = 24,828.95

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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.