Home / 20,876.51-31,318.73-8,397.56

Finding the Fourth Proportional to 20,876.51, 31,318.73 and 8,397.56

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Solution

The fourth proportional to 20,876.51, 31,318.73 and 8,397.56 is: 12,597.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.51 : 31,318.73 = 8,397.56 : x
  2. Step 2: Convert to fraction form
    20,876.51/31,318.73 = 8,397.56/x
  3. Step 3: Cross multiply
    20,876.51x = 31,318.73 × 8,397.56
  4. Step 4: Simplify right side
    20,876.51x = 263,000,914.30
  5. Step 5: Solve for x
    x = 263,000,914.30/20,876.51
  6. Step 6: Final answer
    x = 12,597.93

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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.