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Finding the Fourth Proportional to 11,940.84, 17,904.31 and 8,780.17

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Solution

The fourth proportional to 11,940.84, 17,904.31 and 8,780.17 is: 13,165.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,940.84 : 17,904.31 = 8,780.17 : x
  2. Step 2: Convert to fraction form
    11,940.84/17,904.31 = 8,780.17/x
  3. Step 3: Cross multiply
    11,940.84x = 17,904.31 × 8,780.17
  4. Step 4: Simplify right side
    11,940.84x = 157,202,752.11
  5. Step 5: Solve for x
    x = 157,202,752.11/11,940.84
  6. Step 6: Final answer
    x = 13,165.14

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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.