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Finding the Fourth Proportional to 11,186.92, 15,418.92 and 7,643.98

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Solution

The fourth proportional to 11,186.92, 15,418.92 and 7,643.98 is: 10,535.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,186.92 : 15,418.92 = 7,643.98 : x
  2. Step 2: Convert to fraction form
    11,186.92/15,418.92 = 7,643.98/x
  3. Step 3: Cross multiply
    11,186.92x = 15,418.92 × 7,643.98
  4. Step 4: Simplify right side
    11,186.92x = 117,861,916.10
  5. Step 5: Solve for x
    x = 117,861,916.10/11,186.92
  6. Step 6: Final answer
    x = 10,535.69

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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.