Home / 39,778.10-54,895.20-21,874.47

Finding the Fourth Proportional to 39,778.10, 54,895.20 and 21,874.47

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Solution

The fourth proportional to 39,778.10, 54,895.20 and 21,874.47 is: 30,187.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,778.10 : 54,895.20 = 21,874.47 : x
  2. Step 2: Convert to fraction form
    39,778.10/54,895.20 = 21,874.47/x
  3. Step 3: Cross multiply
    39,778.10x = 54,895.20 × 21,874.47
  4. Step 4: Simplify right side
    39,778.10x = 1,200,803,426.44
  5. Step 5: Solve for x
    x = 1,200,803,426.44/39,778.10
  6. Step 6: Final answer
    x = 30,187.55

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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.