Home / 20,915.90-31,371.56-6,124.97

Finding the Fourth Proportional to 20,915.90, 31,371.56 and 6,124.97

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Solution

The fourth proportional to 20,915.90, 31,371.56 and 6,124.97 is: 9,186.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.90 : 31,371.56 = 6,124.97 : x
  2. Step 2: Convert to fraction form
    20,915.90/31,371.56 = 6,124.97/x
  3. Step 3: Cross multiply
    20,915.90x = 31,371.56 × 6,124.97
  4. Step 4: Simplify right side
    20,915.90x = 192,149,676.37
  5. Step 5: Solve for x
    x = 192,149,676.37/20,915.90
  6. Step 6: Final answer
    x = 9,186.78

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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.