Home / 20,915.90-31,371.55-6,124.96

Finding the Fourth Proportional to 20,915.90, 31,371.55 and 6,124.96

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Solution

The fourth proportional to 20,915.90, 31,371.55 and 6,124.96 is: 9,186.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.90 : 31,371.55 = 6,124.96 : x
  2. Step 2: Convert to fraction form
    20,915.90/31,371.55 = 6,124.96/x
  3. Step 3: Cross multiply
    20,915.90x = 31,371.55 × 6,124.96
  4. Step 4: Simplify right side
    20,915.90x = 192,149,488.89
  5. Step 5: Solve for x
    x = 192,149,488.89/20,915.90
  6. Step 6: Final answer
    x = 9,186.77

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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.