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Finding the Fourth Proportional to 11,393.99, 15,721.82 and 7,611.09

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Solution

The fourth proportional to 11,393.99, 15,721.82 and 7,611.09 is: 10,502.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,393.99 : 15,721.82 = 7,611.09 : x
  2. Step 2: Convert to fraction form
    11,393.99/15,721.82 = 7,611.09/x
  3. Step 3: Cross multiply
    11,393.99x = 15,721.82 × 7,611.09
  4. Step 4: Simplify right side
    11,393.99x = 119,660,186.98
  5. Step 5: Solve for x
    x = 119,660,186.98/11,393.99
  6. Step 6: Final answer
    x = 10,502.04

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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.