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Finding the Fourth Proportional to 8,972.30, 12,375.60 and 5,384.82

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Solution

The fourth proportional to 8,972.30, 12,375.60 and 5,384.82 is: 7,427.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972.30 : 12,375.60 = 5,384.82 : x
  2. Step 2: Convert to fraction form
    8,972.30/12,375.60 = 5,384.82/x
  3. Step 3: Cross multiply
    8,972.30x = 12,375.60 × 5,384.82
  4. Step 4: Simplify right side
    8,972.30x = 66,640,378.39
  5. Step 5: Solve for x
    x = 66,640,378.39/8,972.30
  6. Step 6: Final answer
    x = 7,427.35

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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.