Home / 12,491.28-18,820.26-11,306.79

Finding the Fourth Proportional to 12,491.28, 18,820.26 and 11,306.79

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Solution

The fourth proportional to 12,491.28, 18,820.26 and 11,306.79 is: 17,035.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.28 : 18,820.26 = 11,306.79 : x
  2. Step 2: Convert to fraction form
    12,491.28/18,820.26 = 11,306.79/x
  3. Step 3: Cross multiply
    12,491.28x = 18,820.26 × 11,306.79
  4. Step 4: Simplify right side
    12,491.28x = 212,796,727.57
  5. Step 5: Solve for x
    x = 212,796,727.57/12,491.28
  6. Step 6: Final answer
    x = 17,035.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.