Home / 20,470.02-30,716.94-7,989.38

Finding the Fourth Proportional to 20,470.02, 30,716.94 and 7,989.38

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Solution

The fourth proportional to 20,470.02, 30,716.94 and 7,989.38 is: 11,988.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.02 : 30,716.94 = 7,989.38 : x
  2. Step 2: Convert to fraction form
    20,470.02/30,716.94 = 7,989.38/x
  3. Step 3: Cross multiply
    20,470.02x = 30,716.94 × 7,989.38
  4. Step 4: Simplify right side
    20,470.02x = 245,409,306.10
  5. Step 5: Solve for x
    x = 245,409,306.10/20,470.02
  6. Step 6: Final answer
    x = 11,988.72

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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.