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Finding the Fourth Proportional to 19,992.30, 29,981.53 and 11,121.11

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Solution

The fourth proportional to 19,992.30, 29,981.53 and 11,121.11 is: 16,677.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.30 : 29,981.53 = 11,121.11 : x
  2. Step 2: Convert to fraction form
    19,992.30/29,981.53 = 11,121.11/x
  3. Step 3: Cross multiply
    19,992.30x = 29,981.53 × 11,121.11
  4. Step 4: Simplify right side
    19,992.30x = 333,428,069.45
  5. Step 5: Solve for x
    x = 333,428,069.45/19,992.30
  6. Step 6: Final answer
    x = 16,677.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.