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Finding the Fourth Proportional to 8,139.30, 12,208.95 and 7,653.30

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Solution

The fourth proportional to 8,139.30, 12,208.95 and 7,653.30 is: 11,479.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.30 : 12,208.95 = 7,653.30 : x
  2. Step 2: Convert to fraction form
    8,139.30/12,208.95 = 7,653.30/x
  3. Step 3: Cross multiply
    8,139.30x = 12,208.95 × 7,653.30
  4. Step 4: Simplify right side
    8,139.30x = 93,438,757.04
  5. Step 5: Solve for x
    x = 93,438,757.04/8,139.30
  6. Step 6: Final answer
    x = 11,479.95

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Half scale
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Double scale
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Similar ratio
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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.