Home / 20,915.33-31,366.32-6,872.09

Finding the Fourth Proportional to 20,915.33, 31,366.32 and 6,872.09

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Solution

The fourth proportional to 20,915.33, 31,366.32 and 6,872.09 is: 10,305.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.33 : 31,366.32 = 6,872.09 : x
  2. Step 2: Convert to fraction form
    20,915.33/31,366.32 = 6,872.09/x
  3. Step 3: Cross multiply
    20,915.33x = 31,366.32 × 6,872.09
  4. Step 4: Simplify right side
    20,915.33x = 215,552,017.18
  5. Step 5: Solve for x
    x = 215,552,017.18/20,915.33
  6. Step 6: Final answer
    x = 10,305.94

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1.5x scale

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.