Home / 12,003.95-18,005.72-5,425.53

Finding the Fourth Proportional to 12,003.95, 18,005.72 and 5,425.53

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Solution

The fourth proportional to 12,003.95, 18,005.72 and 5,425.53 is: 8,138.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,003.95 : 18,005.72 = 5,425.53 : x
  2. Step 2: Convert to fraction form
    12,003.95/18,005.72 = 5,425.53/x
  3. Step 3: Cross multiply
    12,003.95x = 18,005.72 × 5,425.53
  4. Step 4: Simplify right side
    12,003.95x = 97,690,546.90
  5. Step 5: Solve for x
    x = 97,690,546.90/12,003.95
  6. Step 6: Final answer
    x = 8,138.20

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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.