Home / 8,385.93-12,578.76-2,145.89

Finding the Fourth Proportional to 8,385.93, 12,578.76 and 2,145.89

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Solution

The fourth proportional to 8,385.93, 12,578.76 and 2,145.89 is: 3,218.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,385.93 : 12,578.76 = 2,145.89 : x
  2. Step 2: Convert to fraction form
    8,385.93/12,578.76 = 2,145.89/x
  3. Step 3: Cross multiply
    8,385.93x = 12,578.76 × 2,145.89
  4. Step 4: Simplify right side
    8,385.93x = 26,992,572.40
  5. Step 5: Solve for x
    x = 26,992,572.40/8,385.93
  6. Step 6: Final answer
    x = 3,218.79

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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.