Home / 39,980.88-55,176.86-22,990.65

Finding the Fourth Proportional to 39,980.88, 55,176.86 and 22,990.65

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Solution

The fourth proportional to 39,980.88, 55,176.86 and 22,990.65 is: 31,728.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,980.88 : 55,176.86 = 22,990.65 : x
  2. Step 2: Convert to fraction form
    39,980.88/55,176.86 = 22,990.65/x
  3. Step 3: Cross multiply
    39,980.88x = 55,176.86 × 22,990.65
  4. Step 4: Simplify right side
    39,980.88x = 1,268,551,600.47
  5. Step 5: Solve for x
    x = 1,268,551,600.47/39,980.88
  6. Step 6: Final answer
    x = 31,728.96

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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.