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Finding the Fourth Proportional to 9,336.60, 12,887.81 and 8,340.15

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Solution

The fourth proportional to 9,336.60, 12,887.81 and 8,340.15 is: 11,512.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,336.60 : 12,887.81 = 8,340.15 : x
  2. Step 2: Convert to fraction form
    9,336.60/12,887.81 = 8,340.15/x
  3. Step 3: Cross multiply
    9,336.60x = 12,887.81 × 8,340.15
  4. Step 4: Simplify right side
    9,336.60x = 107,486,162.43
  5. Step 5: Solve for x
    x = 107,486,162.43/9,336.60
  6. Step 6: Final answer
    x = 11,512.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.