Home / 22,811.28-31,479.26-12,739.91

Finding the Fourth Proportional to 22,811.28, 31,479.26 and 12,739.91

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Solution

The fourth proportional to 22,811.28, 31,479.26 and 12,739.91 is: 17,580.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,811.28 : 31,479.26 = 12,739.91 : x
  2. Step 2: Convert to fraction form
    22,811.28/31,479.26 = 12,739.91/x
  3. Step 3: Cross multiply
    22,811.28x = 31,479.26 × 12,739.91
  4. Step 4: Simplify right side
    22,811.28x = 401,042,718.17
  5. Step 5: Solve for x
    x = 401,042,718.17/22,811.28
  6. Step 6: Final answer
    x = 17,580.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.