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Finding the Fourth Proportional to 8,759.60, 13,139.40 and 8,586.80

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Solution

The fourth proportional to 8,759.60, 13,139.40 and 8,586.80 is: 12,880.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,759.60 : 13,139.40 = 8,586.80 : x
  2. Step 2: Convert to fraction form
    8,759.60/13,139.40 = 8,586.80/x
  3. Step 3: Cross multiply
    8,759.60x = 13,139.40 × 8,586.80
  4. Step 4: Simplify right side
    8,759.60x = 112,825,399.92
  5. Step 5: Solve for x
    x = 112,825,399.92/8,759.60
  6. Step 6: Final answer
    x = 12,880.20

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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.