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Finding the Fourth Proportional to 21,904.92, 30,227.04 and 12,952.80

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Solution

The fourth proportional to 21,904.92, 30,227.04 and 12,952.80 is: 17,873.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.92 : 30,227.04 = 12,952.80 : x
  2. Step 2: Convert to fraction form
    21,904.92/30,227.04 = 12,952.80/x
  3. Step 3: Cross multiply
    21,904.92x = 30,227.04 × 12,952.80
  4. Step 4: Simplify right side
    21,904.92x = 391,524,803.71
  5. Step 5: Solve for x
    x = 391,524,803.71/21,904.92
  6. Step 6: Final answer
    x = 17,873.83

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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.