Home / 19,920.78-27,489.66-10,966.56

Finding the Fourth Proportional to 19,920.78, 27,489.66 and 10,966.56

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Solution

The fourth proportional to 19,920.78, 27,489.66 and 10,966.56 is: 15,133.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.78 : 27,489.66 = 10,966.56 : x
  2. Step 2: Convert to fraction form
    19,920.78/27,489.66 = 10,966.56/x
  3. Step 3: Cross multiply
    19,920.78x = 27,489.66 × 10,966.56
  4. Step 4: Simplify right side
    19,920.78x = 301,466,861.56
  5. Step 5: Solve for x
    x = 301,466,861.56/19,920.78
  6. Step 6: Final answer
    x = 15,133.29

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1.5x scale

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.