Home / 12,481.65-18,720.35-4,160.79

Finding the Fourth Proportional to 12,481.65, 18,720.35 and 4,160.79

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Solution

The fourth proportional to 12,481.65, 18,720.35 and 4,160.79 is: 6,240.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,481.65 : 18,720.35 = 4,160.79 : x
  2. Step 2: Convert to fraction form
    12,481.65/18,720.35 = 4,160.79/x
  3. Step 3: Cross multiply
    12,481.65x = 18,720.35 × 4,160.79
  4. Step 4: Simplify right side
    12,481.65x = 77,891,445.08
  5. Step 5: Solve for x
    x = 77,891,445.08/12,481.65
  6. Step 6: Final answer
    x = 6,240.48

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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.