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Finding the Fourth Proportional to 6,616.96, 9,129.60 and 4,262.40

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Solution

The fourth proportional to 6,616.96, 9,129.60 and 4,262.40 is: 5,880.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,616.96 : 9,129.60 = 4,262.40 : x
  2. Step 2: Convert to fraction form
    6,616.96/9,129.60 = 4,262.40/x
  3. Step 3: Cross multiply
    6,616.96x = 9,129.60 × 4,262.40
  4. Step 4: Simplify right side
    6,616.96x = 38,914,007.04
  5. Step 5: Solve for x
    x = 38,914,007.04/6,616.96
  6. Step 6: Final answer
    x = 5,880.95

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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.