Home / 20,481.60-30,702.72-13,065.12

Finding the Fourth Proportional to 20,481.60, 30,702.72 and 13,065.12

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Solution

The fourth proportional to 20,481.60, 30,702.72 and 13,065.12 is: 19,585.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.60 : 30,702.72 = 13,065.12 : x
  2. Step 2: Convert to fraction form
    20,481.60/30,702.72 = 13,065.12/x
  3. Step 3: Cross multiply
    20,481.60x = 30,702.72 × 13,065.12
  4. Step 4: Simplify right side
    20,481.60x = 401,134,721.13
  5. Step 5: Solve for x
    x = 401,134,721.13/20,481.60
  6. Step 6: Final answer
    x = 19,585.13

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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.