Home / 20,915.31-31,370.67-6,124.37

Finding the Fourth Proportional to 20,915.31, 31,370.67 and 6,124.37

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Solution

The fourth proportional to 20,915.31, 31,370.67 and 6,124.37 is: 9,185.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.31 : 31,370.67 = 6,124.37 : x
  2. Step 2: Convert to fraction form
    20,915.31/31,370.67 = 6,124.37/x
  3. Step 3: Cross multiply
    20,915.31x = 31,370.67 × 6,124.37
  4. Step 4: Simplify right side
    20,915.31x = 192,125,559.61
  5. Step 5: Solve for x
    x = 192,125,559.61/20,915.31
  6. Step 6: Final answer
    x = 9,185.88

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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.