Home / 20,979.02-31,470.06-5,985.92

Finding the Fourth Proportional to 20,979.02, 31,470.06 and 5,985.92

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Solution

The fourth proportional to 20,979.02, 31,470.06 and 5,985.92 is: 8,979.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.02 : 31,470.06 = 5,985.92 : x
  2. Step 2: Convert to fraction form
    20,979.02/31,470.06 = 5,985.92/x
  3. Step 3: Cross multiply
    20,979.02x = 31,470.06 × 5,985.92
  4. Step 4: Simplify right side
    20,979.02x = 188,377,261.56
  5. Step 5: Solve for x
    x = 188,377,261.56/20,979.02
  6. Step 6: Final answer
    x = 8,979.32

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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.