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Finding the Fourth Proportional to 8,292.60, 12,438.90 and 6,105.60

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Solution

The fourth proportional to 8,292.60, 12,438.90 and 6,105.60 is: 9,158.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,292.60 : 12,438.90 = 6,105.60 : x
  2. Step 2: Convert to fraction form
    8,292.60/12,438.90 = 6,105.60/x
  3. Step 3: Cross multiply
    8,292.60x = 12,438.90 × 6,105.60
  4. Step 4: Simplify right side
    8,292.60x = 75,946,947.84
  5. Step 5: Solve for x
    x = 75,946,947.84/8,292.60
  6. Step 6: Final answer
    x = 9,158.40

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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.