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Finding the Fourth Proportional to 8,921.26, 12,312.75 and 6,793.36

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Solution

The fourth proportional to 8,921.26, 12,312.75 and 6,793.36 is: 9,375.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.26 : 12,312.75 = 6,793.36 : x
  2. Step 2: Convert to fraction form
    8,921.26/12,312.75 = 6,793.36/x
  3. Step 3: Cross multiply
    8,921.26x = 12,312.75 × 6,793.36
  4. Step 4: Simplify right side
    8,921.26x = 83,644,943.34
  5. Step 5: Solve for x
    x = 83,644,943.34/8,921.26
  6. Step 6: Final answer
    x = 9,375.91

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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.