Home / 20,983.65-31,480.80-7,836.13

Finding the Fourth Proportional to 20,983.65, 31,480.80 and 7,836.13

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Solution

The fourth proportional to 20,983.65, 31,480.80 and 7,836.13 is: 11,756.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.65 : 31,480.80 = 7,836.13 : x
  2. Step 2: Convert to fraction form
    20,983.65/31,480.80 = 7,836.13/x
  3. Step 3: Cross multiply
    20,983.65x = 31,480.80 × 7,836.13
  4. Step 4: Simplify right side
    20,983.65x = 246,687,641.30
  5. Step 5: Solve for x
    x = 246,687,641.30/20,983.65
  6. Step 6: Final answer
    x = 11,756.18

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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.