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Finding the Fourth Proportional to 17,640.78, 26,472.14 and 10,990.34

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Solution

The fourth proportional to 17,640.78, 26,472.14 and 10,990.34 is: 16,492.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,640.78 : 26,472.14 = 10,990.34 : x
  2. Step 2: Convert to fraction form
    17,640.78/26,472.14 = 10,990.34/x
  3. Step 3: Cross multiply
    17,640.78x = 26,472.14 × 10,990.34
  4. Step 4: Simplify right side
    17,640.78x = 290,937,819.13
  5. Step 5: Solve for x
    x = 290,937,819.13/17,640.78
  6. Step 6: Final answer
    x = 16,492.34

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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.