Home / 12,543.42-18,815.40-4,223.73

Finding the Fourth Proportional to 12,543.42, 18,815.40 and 4,223.73

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Solution

The fourth proportional to 12,543.42, 18,815.40 and 4,223.73 is: 6,335.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.42 : 18,815.40 = 4,223.73 : x
  2. Step 2: Convert to fraction form
    12,543.42/18,815.40 = 4,223.73/x
  3. Step 3: Cross multiply
    12,543.42x = 18,815.40 × 4,223.73
  4. Step 4: Simplify right side
    12,543.42x = 79,471,169.44
  5. Step 5: Solve for x
    x = 79,471,169.44/12,543.42
  6. Step 6: Final answer
    x = 6,335.69

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Double scale
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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.