Home / 12,287.13-18,431.38-3,521.81

Finding the Fourth Proportional to 12,287.13, 18,431.38 and 3,521.81

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Solution

The fourth proportional to 12,287.13, 18,431.38 and 3,521.81 is: 5,282.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,287.13 : 18,431.38 = 3,521.81 : x
  2. Step 2: Convert to fraction form
    12,287.13/18,431.38 = 3,521.81/x
  3. Step 3: Cross multiply
    12,287.13x = 18,431.38 × 3,521.81
  4. Step 4: Simplify right side
    12,287.13x = 64,911,868.88
  5. Step 5: Solve for x
    x = 64,911,868.88/12,287.13
  6. Step 6: Final answer
    x = 5,282.92

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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.