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Finding the Fourth Proportional to 8,399.54, 12,608.60 and 7,099.40

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Solution

The fourth proportional to 8,399.54, 12,608.60 and 7,099.40 is: 10,656.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,399.54 : 12,608.60 = 7,099.40 : x
  2. Step 2: Convert to fraction form
    8,399.54/12,608.60 = 7,099.40/x
  3. Step 3: Cross multiply
    8,399.54x = 12,608.60 × 7,099.40
  4. Step 4: Simplify right side
    8,399.54x = 89,513,490.86
  5. Step 5: Solve for x
    x = 89,513,490.86/8,399.54
  6. Step 6: Final answer
    x = 10,656.95

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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.