Home / 20,979.98-31,470.17-5,987.08

Finding the Fourth Proportional to 20,979.98, 31,470.17 and 5,987.08

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Solution

The fourth proportional to 20,979.98, 31,470.17 and 5,987.08 is: 8,980.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.98 : 31,470.17 = 5,987.08 : x
  2. Step 2: Convert to fraction form
    20,979.98/31,470.17 = 5,987.08/x
  3. Step 3: Cross multiply
    20,979.98x = 31,470.17 × 5,987.08
  4. Step 4: Simplify right side
    20,979.98x = 188,414,395.47
  5. Step 5: Solve for x
    x = 188,414,395.47/20,979.98
  6. Step 6: Final answer
    x = 8,980.68

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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.