Home / 20,915.11-31,377.35-7,063.75

Finding the Fourth Proportional to 20,915.11, 31,377.35 and 7,063.75

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Solution

The fourth proportional to 20,915.11, 31,377.35 and 7,063.75 is: 10,597.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.11 : 31,377.35 = 7,063.75 : x
  2. Step 2: Convert to fraction form
    20,915.11/31,377.35 = 7,063.75/x
  3. Step 3: Cross multiply
    20,915.11x = 31,377.35 × 7,063.75
  4. Step 4: Simplify right side
    20,915.11x = 221,641,720.74
  5. Step 5: Solve for x
    x = 221,641,720.74/20,915.11
  6. Step 6: Final answer
    x = 10,597.21

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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.