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Finding the Fourth Proportional to 8,688.78, 13,008.84 and 4,519.71

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Solution

The fourth proportional to 8,688.78, 13,008.84 and 4,519.71 is: 6,766.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.78 : 13,008.84 = 4,519.71 : x
  2. Step 2: Convert to fraction form
    8,688.78/13,008.84 = 4,519.71/x
  3. Step 3: Cross multiply
    8,688.78x = 13,008.84 × 4,519.71
  4. Step 4: Simplify right side
    8,688.78x = 58,796,184.24
  5. Step 5: Solve for x
    x = 58,796,184.24/8,688.78
  6. Step 6: Final answer
    x = 6,766.91

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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.