Home / 8,215.91-12,316.47-2,949.68

Finding the Fourth Proportional to 8,215.91, 12,316.47 and 2,949.68

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Solution

The fourth proportional to 8,215.91, 12,316.47 and 2,949.68 is: 4,421.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,215.91 : 12,316.47 = 2,949.68 : x
  2. Step 2: Convert to fraction form
    8,215.91/12,316.47 = 2,949.68/x
  3. Step 3: Cross multiply
    8,215.91x = 12,316.47 × 2,949.68
  4. Step 4: Simplify right side
    8,215.91x = 36,329,645.23
  5. Step 5: Solve for x
    x = 36,329,645.23/8,215.91
  6. Step 6: Final answer
    x = 4,421.87

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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.