Home / 8,215.60-12,323.40-7,146.40

Finding the Fourth Proportional to 8,215.60, 12,323.40 and 7,146.40

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Solution

The fourth proportional to 8,215.60, 12,323.40 and 7,146.40 is: 10,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,215.60 : 12,323.40 = 7,146.40 : x
  2. Step 2: Convert to fraction form
    8,215.60/12,323.40 = 7,146.40/x
  3. Step 3: Cross multiply
    8,215.60x = 12,323.40 × 7,146.40
  4. Step 4: Simplify right side
    8,215.60x = 88,067,945.76
  5. Step 5: Solve for x
    x = 88,067,945.76/8,215.60
  6. Step 6: Final answer
    x = 10,719.60

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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.