Home / 20,214.10-30,321.15-13,215.70

Finding the Fourth Proportional to 20,214.10, 30,321.15 and 13,215.70

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Solution

The fourth proportional to 20,214.10, 30,321.15 and 13,215.70 is: 19,823.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,214.10 : 30,321.15 = 13,215.70 : x
  2. Step 2: Convert to fraction form
    20,214.10/30,321.15 = 13,215.70/x
  3. Step 3: Cross multiply
    20,214.10x = 30,321.15 × 13,215.70
  4. Step 4: Simplify right side
    20,214.10x = 400,715,222.06
  5. Step 5: Solve for x
    x = 400,715,222.06/20,214.10
  6. Step 6: Final answer
    x = 19,823.55

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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.