Home / 12,421.31-18,631.97-3,187.31

Finding the Fourth Proportional to 12,421.31, 18,631.97 and 3,187.31

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Solution

The fourth proportional to 12,421.31, 18,631.97 and 3,187.31 is: 4,780.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.31 : 18,631.97 = 3,187.31 : x
  2. Step 2: Convert to fraction form
    12,421.31/18,631.97 = 3,187.31/x
  3. Step 3: Cross multiply
    12,421.31x = 18,631.97 × 3,187.31
  4. Step 4: Simplify right side
    12,421.31x = 59,385,864.30
  5. Step 5: Solve for x
    x = 59,385,864.30/12,421.31
  6. Step 6: Final answer
    x = 4,780.97

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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.