Home / 20,876.66-31,316.47-8,396.75

Finding the Fourth Proportional to 20,876.66, 31,316.47 and 8,396.75

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Solution

The fourth proportional to 20,876.66, 31,316.47 and 8,396.75 is: 12,595.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.66 : 31,316.47 = 8,396.75 : x
  2. Step 2: Convert to fraction form
    20,876.66/31,316.47 = 8,396.75/x
  3. Step 3: Cross multiply
    20,876.66x = 31,316.47 × 8,396.75
  4. Step 4: Simplify right side
    20,876.66x = 262,956,569.47
  5. Step 5: Solve for x
    x = 262,956,569.47/20,876.66
  6. Step 6: Final answer
    x = 12,595.72

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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.