Home / 12,139.62-18,216.51-5,119.20

Finding the Fourth Proportional to 12,139.62, 18,216.51 and 5,119.20

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Solution

The fourth proportional to 12,139.62, 18,216.51 and 5,119.20 is: 7,681.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.62 : 18,216.51 = 5,119.20 : x
  2. Step 2: Convert to fraction form
    12,139.62/18,216.51 = 5,119.20/x
  3. Step 3: Cross multiply
    12,139.62x = 18,216.51 × 5,119.20
  4. Step 4: Simplify right side
    12,139.62x = 93,253,957.99
  5. Step 5: Solve for x
    x = 93,253,957.99/12,139.62
  6. Step 6: Final answer
    x = 7,681.79

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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.