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Finding the Fourth Proportional to 19,920.96, 27,489.78 and 10,966.98

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Solution

The fourth proportional to 19,920.96, 27,489.78 and 10,966.98 is: 15,133.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.96 : 27,489.78 = 10,966.98 : x
  2. Step 2: Convert to fraction form
    19,920.96/27,489.78 = 10,966.98/x
  3. Step 3: Cross multiply
    19,920.96x = 27,489.78 × 10,966.98
  4. Step 4: Simplify right side
    19,920.96x = 301,479,867.46
  5. Step 5: Solve for x
    x = 301,479,867.46/19,920.96
  6. Step 6: Final answer
    x = 15,133.80

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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.