Home / 12,489.55-18,734.49-4,169.63

Finding the Fourth Proportional to 12,489.55, 18,734.49 and 4,169.63

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Solution

The fourth proportional to 12,489.55, 18,734.49 and 4,169.63 is: 6,254.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.55 : 18,734.49 = 4,169.63 : x
  2. Step 2: Convert to fraction form
    12,489.55/18,734.49 = 4,169.63/x
  3. Step 3: Cross multiply
    12,489.55x = 18,734.49 × 4,169.63
  4. Step 4: Simplify right side
    12,489.55x = 78,115,938.37
  5. Step 5: Solve for x
    x = 78,115,938.37/12,489.55
  6. Step 6: Final answer
    x = 6,254.51

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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.