Home / 12,120.32-18,180.47-3,800.97

Finding the Fourth Proportional to 12,120.32, 18,180.47 and 3,800.97

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Solution

The fourth proportional to 12,120.32, 18,180.47 and 3,800.97 is: 5,701.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.32 : 18,180.47 = 3,800.97 : x
  2. Step 2: Convert to fraction form
    12,120.32/18,180.47 = 3,800.97/x
  3. Step 3: Cross multiply
    12,120.32x = 18,180.47 × 3,800.97
  4. Step 4: Simplify right side
    12,120.32x = 69,103,430.56
  5. Step 5: Solve for x
    x = 69,103,430.56/12,120.32
  6. Step 6: Final answer
    x = 5,701.45

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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.