Home / 12,247.02-18,375.09-6,978.78

Finding the Fourth Proportional to 12,247.02, 18,375.09 and 6,978.78

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Solution

The fourth proportional to 12,247.02, 18,375.09 and 6,978.78 is: 10,470.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,247.02 : 18,375.09 = 6,978.78 : x
  2. Step 2: Convert to fraction form
    12,247.02/18,375.09 = 6,978.78/x
  3. Step 3: Cross multiply
    12,247.02x = 18,375.09 × 6,978.78
  4. Step 4: Simplify right side
    12,247.02x = 128,235,710.59
  5. Step 5: Solve for x
    x = 128,235,710.59/12,247.02
  6. Step 6: Final answer
    x = 10,470.77

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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.