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Finding the Fourth Proportional to 6,618.96, 9,132.78 and 3,928.92

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Solution

The fourth proportional to 6,618.96, 9,132.78 and 3,928.92 is: 5,421.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,618.96 : 9,132.78 = 3,928.92 : x
  2. Step 2: Convert to fraction form
    6,618.96/9,132.78 = 3,928.92/x
  3. Step 3: Cross multiply
    6,618.96x = 9,132.78 × 3,928.92
  4. Step 4: Simplify right side
    6,618.96x = 35,881,962.00
  5. Step 5: Solve for x
    x = 35,881,962.00/6,618.96
  6. Step 6: Final answer
    x = 5,421.09

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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.