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Finding the Fourth Proportional to 8,661.10, 12,987.02 and 4,496.91

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Solution

The fourth proportional to 8,661.10, 12,987.02 and 4,496.91 is: 6,742.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.10 : 12,987.02 = 4,496.91 : x
  2. Step 2: Convert to fraction form
    8,661.10/12,987.02 = 4,496.91/x
  3. Step 3: Cross multiply
    8,661.10x = 12,987.02 × 4,496.91
  4. Step 4: Simplify right side
    8,661.10x = 58,401,471.35
  5. Step 5: Solve for x
    x = 58,401,471.35/8,661.10
  6. Step 6: Final answer
    x = 6,742.96

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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.