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Finding the Fourth Proportional to 8,811.40, 13,217.10 and 8,681.80

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Solution

The fourth proportional to 8,811.40, 13,217.10 and 8,681.80 is: 13,022.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.40 : 13,217.10 = 8,681.80 : x
  2. Step 2: Convert to fraction form
    8,811.40/13,217.10 = 8,681.80/x
  3. Step 3: Cross multiply
    8,811.40x = 13,217.10 × 8,681.80
  4. Step 4: Simplify right side
    8,811.40x = 114,748,218.78
  5. Step 5: Solve for x
    x = 114,748,218.78/8,811.40
  6. Step 6: Final answer
    x = 13,022.70

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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.