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Finding the Fourth Proportional to 8,442.78, 12,664.14 and 2,286.78

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Solution

The fourth proportional to 8,442.78, 12,664.14 and 2,286.78 is: 3,430.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,442.78 : 12,664.14 = 2,286.78 : x
  2. Step 2: Convert to fraction form
    8,442.78/12,664.14 = 2,286.78/x
  3. Step 3: Cross multiply
    8,442.78x = 12,664.14 × 2,286.78
  4. Step 4: Simplify right side
    8,442.78x = 28,960,102.07
  5. Step 5: Solve for x
    x = 28,960,102.07/8,442.78
  6. Step 6: Final answer
    x = 3,430.16

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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.