Home / 12,143.51-18,215.17-3,378.40

Finding the Fourth Proportional to 12,143.51, 18,215.17 and 3,378.40

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Solution

The fourth proportional to 12,143.51, 18,215.17 and 3,378.40 is: 5,067.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.51 : 18,215.17 = 3,378.40 : x
  2. Step 2: Convert to fraction form
    12,143.51/18,215.17 = 3,378.40/x
  3. Step 3: Cross multiply
    12,143.51x = 18,215.17 × 3,378.40
  4. Step 4: Simplify right side
    12,143.51x = 61,538,122.82
  5. Step 5: Solve for x
    x = 61,538,122.82/12,143.51
  6. Step 6: Final answer
    x = 5,067.57

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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.