Home / 20,915.28-31,370.62-6,124.34

Finding the Fourth Proportional to 20,915.28, 31,370.62 and 6,124.34

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Solution

The fourth proportional to 20,915.28, 31,370.62 and 6,124.34 is: 9,185.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.28 : 31,370.62 = 6,124.34 : x
  2. Step 2: Convert to fraction form
    20,915.28/31,370.62 = 6,124.34/x
  3. Step 3: Cross multiply
    20,915.28x = 31,370.62 × 6,124.34
  4. Step 4: Simplify right side
    20,915.28x = 192,124,288.37
  5. Step 5: Solve for x
    x = 192,124,288.37/20,915.28
  6. Step 6: Final answer
    x = 9,185.84

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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.