Home / 12,108.40-18,151.66-4,315.39

Finding the Fourth Proportional to 12,108.40, 18,151.66 and 4,315.39

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Solution

The fourth proportional to 12,108.40, 18,151.66 and 4,315.39 is: 6,469.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.40 : 18,151.66 = 4,315.39 : x
  2. Step 2: Convert to fraction form
    12,108.40/18,151.66 = 4,315.39/x
  3. Step 3: Cross multiply
    12,108.40x = 18,151.66 × 4,315.39
  4. Step 4: Simplify right side
    12,108.40x = 78,331,492.05
  5. Step 5: Solve for x
    x = 78,331,492.05/12,108.40
  6. Step 6: Final answer
    x = 6,469.19

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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.