Home / 20,257.40-30,386.10-13,915.10

Finding the Fourth Proportional to 20,257.40, 30,386.10 and 13,915.10

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Solution

The fourth proportional to 20,257.40, 30,386.10 and 13,915.10 is: 20,872.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,257.40 : 30,386.10 = 13,915.10 : x
  2. Step 2: Convert to fraction form
    20,257.40/30,386.10 = 13,915.10/x
  3. Step 3: Cross multiply
    20,257.40x = 30,386.10 × 13,915.10
  4. Step 4: Simplify right side
    20,257.40x = 422,825,620.11
  5. Step 5: Solve for x
    x = 422,825,620.11/20,257.40
  6. Step 6: Final answer
    x = 20,872.65

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Similar ratio
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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.