Home / 20,960.28-28,915.03-12,456.38

Finding the Fourth Proportional to 20,960.28, 28,915.03 and 12,456.38

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Solution

The fourth proportional to 20,960.28, 28,915.03 and 12,456.38 is: 17,183.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.28 : 28,915.03 = 12,456.38 : x
  2. Step 2: Convert to fraction form
    20,960.28/28,915.03 = 12,456.38/x
  3. Step 3: Cross multiply
    20,960.28x = 28,915.03 × 12,456.38
  4. Step 4: Simplify right side
    20,960.28x = 360,176,673.40
  5. Step 5: Solve for x
    x = 360,176,673.40/20,960.28
  6. Step 6: Final answer
    x = 17,183.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.