Home / 12,963.20-17,889.12-8,247.38

Finding the Fourth Proportional to 12,963.20, 17,889.12 and 8,247.38

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Solution

The fourth proportional to 12,963.20, 17,889.12 and 8,247.38 is: 11,381.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,963.20 : 17,889.12 = 8,247.38 : x
  2. Step 2: Convert to fraction form
    12,963.20/17,889.12 = 8,247.38/x
  3. Step 3: Cross multiply
    12,963.20x = 17,889.12 × 8,247.38
  4. Step 4: Simplify right side
    12,963.20x = 147,538,281.06
  5. Step 5: Solve for x
    x = 147,538,281.06/12,963.20
  6. Step 6: Final answer
    x = 11,381.32

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1.5x scale

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.