Home / 21,107.11-31,648.96-8,635.89

Finding the Fourth Proportional to 21,107.11, 31,648.96 and 8,635.89

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Solution

The fourth proportional to 21,107.11, 31,648.96 and 8,635.89 is: 12,949.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.11 : 31,648.96 = 8,635.89 : x
  2. Step 2: Convert to fraction form
    21,107.11/31,648.96 = 8,635.89/x
  3. Step 3: Cross multiply
    21,107.11x = 31,648.96 × 8,635.89
  4. Step 4: Simplify right side
    21,107.11x = 273,316,937.17
  5. Step 5: Solve for x
    x = 273,316,937.17/21,107.11
  6. Step 6: Final answer
    x = 12,949.05

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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.