Home / 19,980.68-27,579.67-12,422.55

Finding the Fourth Proportional to 19,980.68, 27,579.67 and 12,422.55

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Solution

The fourth proportional to 19,980.68, 27,579.67 and 12,422.55 is: 17,147.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.68 : 27,579.67 = 12,422.55 : x
  2. Step 2: Convert to fraction form
    19,980.68/27,579.67 = 12,422.55/x
  3. Step 3: Cross multiply
    19,980.68x = 27,579.67 × 12,422.55
  4. Step 4: Simplify right side
    19,980.68x = 342,609,691.66
  5. Step 5: Solve for x
    x = 342,609,691.66/19,980.68
  6. Step 6: Final answer
    x = 17,147.05

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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.