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Finding the Fourth Proportional to 18,002.80, 26,979.90 and 12,062.80

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Solution

The fourth proportional to 18,002.80, 26,979.90 and 12,062.80 is: 18,077.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,002.80 : 26,979.90 = 12,062.80 : x
  2. Step 2: Convert to fraction form
    18,002.80/26,979.90 = 12,062.80/x
  3. Step 3: Cross multiply
    18,002.80x = 26,979.90 × 12,062.80
  4. Step 4: Simplify right side
    18,002.80x = 325,453,137.72
  5. Step 5: Solve for x
    x = 325,453,137.72/18,002.80
  6. Step 6: Final answer
    x = 18,077.92

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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.