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Finding the Fourth Proportional to 8,479.69, 12,717.07 and 2,931.59

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Solution

The fourth proportional to 8,479.69, 12,717.07 and 2,931.59 is: 4,396.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.69 : 12,717.07 = 2,931.59 : x
  2. Step 2: Convert to fraction form
    8,479.69/12,717.07 = 2,931.59/x
  3. Step 3: Cross multiply
    8,479.69x = 12,717.07 × 2,931.59
  4. Step 4: Simplify right side
    8,479.69x = 37,281,259.70
  5. Step 5: Solve for x
    x = 37,281,259.70/8,479.69
  6. Step 6: Final answer
    x = 4,396.54

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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.