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Finding the Fourth Proportional to 11,355.72, 15,660.92 and 7,950.98

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Solution

The fourth proportional to 11,355.72, 15,660.92 and 7,950.98 is: 10,965.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.72 : 15,660.92 = 7,950.98 : x
  2. Step 2: Convert to fraction form
    11,355.72/15,660.92 = 7,950.98/x
  3. Step 3: Cross multiply
    11,355.72x = 15,660.92 × 7,950.98
  4. Step 4: Simplify right side
    11,355.72x = 124,519,543.64
  5. Step 5: Solve for x
    x = 124,519,543.64/11,355.72
  6. Step 6: Final answer
    x = 10,965.36

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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.