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Finding the Fourth Proportional to 15,674.61, 21,658.99 and 11,657.66

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Solution

The fourth proportional to 15,674.61, 21,658.99 and 11,657.66 is: 16,108.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,674.61 : 21,658.99 = 11,657.66 : x
  2. Step 2: Convert to fraction form
    15,674.61/21,658.99 = 11,657.66/x
  3. Step 3: Cross multiply
    15,674.61x = 21,658.99 × 11,657.66
  4. Step 4: Simplify right side
    15,674.61x = 252,493,141.36
  5. Step 5: Solve for x
    x = 252,493,141.36/15,674.61
  6. Step 6: Final answer
    x = 16,108.42

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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.