Home / 18,979.76-26,194.38-11,021.78

Finding the Fourth Proportional to 18,979.76, 26,194.38 and 11,021.78

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Solution

The fourth proportional to 18,979.76, 26,194.38 and 11,021.78 is: 15,211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.76 : 26,194.38 = 11,021.78 : x
  2. Step 2: Convert to fraction form
    18,979.76/26,194.38 = 11,021.78/x
  3. Step 3: Cross multiply
    18,979.76x = 26,194.38 × 11,021.78
  4. Step 4: Simplify right side
    18,979.76x = 288,708,693.60
  5. Step 5: Solve for x
    x = 288,708,693.60/18,979.76
  6. Step 6: Final answer
    x = 15,211.40

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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.