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Finding the Fourth Proportional to 8,488.28, 12,659.86 and 7,455.08

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Solution

The fourth proportional to 8,488.28, 12,659.86 and 7,455.08 is: 11,118.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,488.28 : 12,659.86 = 7,455.08 : x
  2. Step 2: Convert to fraction form
    8,488.28/12,659.86 = 7,455.08/x
  3. Step 3: Cross multiply
    8,488.28x = 12,659.86 × 7,455.08
  4. Step 4: Simplify right side
    8,488.28x = 94,380,269.09
  5. Step 5: Solve for x
    x = 94,380,269.09/8,488.28
  6. Step 6: Final answer
    x = 11,118.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.