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Finding the Fourth Proportional to 8,657.49, 12,986.65 and 4,494.87

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Solution

The fourth proportional to 8,657.49, 12,986.65 and 4,494.87 is: 6,742.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.49 : 12,986.65 = 4,494.87 : x
  2. Step 2: Convert to fraction form
    8,657.49/12,986.65 = 4,494.87/x
  3. Step 3: Cross multiply
    8,657.49x = 12,986.65 × 4,494.87
  4. Step 4: Simplify right side
    8,657.49x = 58,373,283.82
  5. Step 5: Solve for x
    x = 58,373,283.82/8,657.49
  6. Step 6: Final answer
    x = 6,742.52

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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.