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Finding the Fourth Proportional to 8,756.40, 13,147.40 and 6,170.80

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Solution

The fourth proportional to 8,756.40, 13,147.40 and 6,170.80 is: 9,265.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,756.40 : 13,147.40 = 6,170.80 : x
  2. Step 2: Convert to fraction form
    8,756.40/13,147.40 = 6,170.80/x
  3. Step 3: Cross multiply
    8,756.40x = 13,147.40 × 6,170.80
  4. Step 4: Simplify right side
    8,756.40x = 81,129,975.92
  5. Step 5: Solve for x
    x = 81,129,975.92/8,756.40
  6. Step 6: Final answer
    x = 9,265.22

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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.