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Finding the Fourth Proportional to 8,608.68, 12,908.76 and 3,061.20

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Solution

The fourth proportional to 8,608.68, 12,908.76 and 3,061.20 is: 4,590.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.68 : 12,908.76 = 3,061.20 : x
  2. Step 2: Convert to fraction form
    8,608.68/12,908.76 = 3,061.20/x
  3. Step 3: Cross multiply
    8,608.68x = 12,908.76 × 3,061.20
  4. Step 4: Simplify right side
    8,608.68x = 39,516,296.11
  5. Step 5: Solve for x
    x = 39,516,296.11/8,608.68
  6. Step 6: Final answer
    x = 4,590.29

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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.