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Finding the Fourth Proportional to 8,645.79, 12,960.60 and 4,691.26

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Solution

The fourth proportional to 8,645.79, 12,960.60 and 4,691.26 is: 7,032.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.79 : 12,960.60 = 4,691.26 : x
  2. Step 2: Convert to fraction form
    8,645.79/12,960.60 = 4,691.26/x
  3. Step 3: Cross multiply
    8,645.79x = 12,960.60 × 4,691.26
  4. Step 4: Simplify right side
    8,645.79x = 60,801,544.36
  5. Step 5: Solve for x
    x = 60,801,544.36/8,645.79
  6. Step 6: Final answer
    x = 7,032.50

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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.