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Finding the Fourth Proportional to 8,418.40, 12,627.84 and 7,456.48

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Solution

The fourth proportional to 8,418.40, 12,627.84 and 7,456.48 is: 11,184.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,418.40 : 12,627.84 = 7,456.48 : x
  2. Step 2: Convert to fraction form
    8,418.40/12,627.84 = 7,456.48/x
  3. Step 3: Cross multiply
    8,418.40x = 12,627.84 × 7,456.48
  4. Step 4: Simplify right side
    8,418.40x = 94,159,236.40
  5. Step 5: Solve for x
    x = 94,159,236.40/8,418.40
  6. Step 6: Final answer
    x = 11,184.93

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1.5x scale

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.