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Finding the Fourth Proportional to 28,045.80, 41,995.80 and 18,131.40

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Solution

The fourth proportional to 28,045.80, 41,995.80 and 18,131.40 is: 27,149.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,045.80 : 41,995.80 = 18,131.40 : x
  2. Step 2: Convert to fraction form
    28,045.80/41,995.80 = 18,131.40/x
  3. Step 3: Cross multiply
    28,045.80x = 41,995.80 × 18,131.40
  4. Step 4: Simplify right side
    28,045.80x = 761,442,648.12
  5. Step 5: Solve for x
    x = 761,442,648.12/28,045.80
  6. Step 6: Final answer
    x = 27,149.97

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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.