Home / 27,985.71-38,616.66-18,930.72

Finding the Fourth Proportional to 27,985.71, 38,616.66 and 18,930.72

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Solution

The fourth proportional to 27,985.71, 38,616.66 and 18,930.72 is: 26,121.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,985.71 : 38,616.66 = 18,930.72 : x
  2. Step 2: Convert to fraction form
    27,985.71/38,616.66 = 18,930.72/x
  3. Step 3: Cross multiply
    27,985.71x = 38,616.66 × 18,930.72
  4. Step 4: Simplify right side
    27,985.71x = 731,041,177.80
  5. Step 5: Solve for x
    x = 731,041,177.80/27,985.71
  6. Step 6: Final answer
    x = 26,121.95

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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.