Home / 39,884.18-55,042.62-21,979.20

Finding the Fourth Proportional to 39,884.18, 55,042.62 and 21,979.20

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Solution

The fourth proportional to 39,884.18, 55,042.62 and 21,979.20 is: 30,332.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.18 : 55,042.62 = 21,979.20 : x
  2. Step 2: Convert to fraction form
    39,884.18/55,042.62 = 21,979.20/x
  3. Step 3: Cross multiply
    39,884.18x = 55,042.62 × 21,979.20
  4. Step 4: Simplify right side
    39,884.18x = 1,209,792,753.50
  5. Step 5: Solve for x
    x = 1,209,792,753.50/39,884.18
  6. Step 6: Final answer
    x = 30,332.65

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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.