Home / 30,138.89-45,217.71-18,144.07

Finding the Fourth Proportional to 30,138.89, 45,217.71 and 18,144.07

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Solution

The fourth proportional to 30,138.89, 45,217.71 and 18,144.07 is: 27,221.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,138.89 : 45,217.71 = 18,144.07 : x
  2. Step 2: Convert to fraction form
    30,138.89/45,217.71 = 18,144.07/x
  3. Step 3: Cross multiply
    30,138.89x = 45,217.71 × 18,144.07
  4. Step 4: Simplify right side
    30,138.89x = 820,433,182.44
  5. Step 5: Solve for x
    x = 820,433,182.44/30,138.89
  6. Step 6: Final answer
    x = 27,221.75

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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.