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Finding the Fourth Proportional to 18,694.80, 28,042.20 and 18,038.70

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Solution

The fourth proportional to 18,694.80, 28,042.20 and 18,038.70 is: 27,058.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,694.80 : 28,042.20 = 18,038.70 : x
  2. Step 2: Convert to fraction form
    18,694.80/28,042.20 = 18,038.70/x
  3. Step 3: Cross multiply
    18,694.80x = 28,042.20 × 18,038.70
  4. Step 4: Simplify right side
    18,694.80x = 505,844,833.14
  5. Step 5: Solve for x
    x = 505,844,833.14/18,694.80
  6. Step 6: Final answer
    x = 27,058.05

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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.