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Finding the Fourth Proportional to 6,612.60, 9,908.10 and 5,640.60

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Solution

The fourth proportional to 6,612.60, 9,908.10 and 5,640.60 is: 8,451.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,612.60 : 9,908.10 = 5,640.60 : x
  2. Step 2: Convert to fraction form
    6,612.60/9,908.10 = 5,640.60/x
  3. Step 3: Cross multiply
    6,612.60x = 9,908.10 × 5,640.60
  4. Step 4: Simplify right side
    6,612.60x = 55,887,628.86
  5. Step 5: Solve for x
    x = 55,887,628.86/6,612.60
  6. Step 6: Final answer
    x = 8,451.69

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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.