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Finding the Fourth Proportional to 8,479.53, 12,700.80 and 5,182.63

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Solution

The fourth proportional to 8,479.53, 12,700.80 and 5,182.63 is: 7,762.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.53 : 12,700.80 = 5,182.63 : x
  2. Step 2: Convert to fraction form
    8,479.53/12,700.80 = 5,182.63/x
  3. Step 3: Cross multiply
    8,479.53x = 12,700.80 × 5,182.63
  4. Step 4: Simplify right side
    8,479.53x = 65,823,515.35
  5. Step 5: Solve for x
    x = 65,823,515.35/8,479.53
  6. Step 6: Final answer
    x = 7,762.64

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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.