Home / 28,239.10-42,305.18-18,850.80

Finding the Fourth Proportional to 28,239.10, 42,305.18 and 18,850.80

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Solution

The fourth proportional to 28,239.10, 42,305.18 and 18,850.80 is: 28,240.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.10 : 42,305.18 = 18,850.80 : x
  2. Step 2: Convert to fraction form
    28,239.10/42,305.18 = 18,850.80/x
  3. Step 3: Cross multiply
    28,239.10x = 42,305.18 × 18,850.80
  4. Step 4: Simplify right side
    28,239.10x = 797,486,487.14
  5. Step 5: Solve for x
    x = 797,486,487.14/28,239.10
  6. Step 6: Final answer
    x = 28,240.51

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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.