Home / 12,135.78-18,204.12-5,470.97

Finding the Fourth Proportional to 12,135.78, 18,204.12 and 5,470.97

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Solution

The fourth proportional to 12,135.78, 18,204.12 and 5,470.97 is: 8,206.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.78 : 18,204.12 = 5,470.97 : x
  2. Step 2: Convert to fraction form
    12,135.78/18,204.12 = 5,470.97/x
  3. Step 3: Cross multiply
    12,135.78x = 18,204.12 × 5,470.97
  4. Step 4: Simplify right side
    12,135.78x = 99,594,254.39
  5. Step 5: Solve for x
    x = 99,594,254.39/12,135.78
  6. Step 6: Final answer
    x = 8,206.66

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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.