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Finding the Fourth Proportional to 11,321.40, 17,066.13 and 10,553.40

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Solution

The fourth proportional to 11,321.40, 17,066.13 and 10,553.40 is: 15,908.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,321.40 : 17,066.13 = 10,553.40 : x
  2. Step 2: Convert to fraction form
    11,321.40/17,066.13 = 10,553.40/x
  3. Step 3: Cross multiply
    11,321.40x = 17,066.13 × 10,553.40
  4. Step 4: Simplify right side
    11,321.40x = 180,105,696.34
  5. Step 5: Solve for x
    x = 180,105,696.34/11,321.40
  6. Step 6: Final answer
    x = 15,908.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.