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Finding the Fourth Proportional to 11,553.69, 15,916.44 and 10,990.89

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Solution

The fourth proportional to 11,553.69, 15,916.44 and 10,990.89 is: 15,141.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,553.69 : 15,916.44 = 10,990.89 : x
  2. Step 2: Convert to fraction form
    11,553.69/15,916.44 = 10,990.89/x
  3. Step 3: Cross multiply
    11,553.69x = 15,916.44 × 10,990.89
  4. Step 4: Simplify right side
    11,553.69x = 174,935,841.23
  5. Step 5: Solve for x
    x = 174,935,841.23/11,553.69
  6. Step 6: Final answer
    x = 15,141.12

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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.