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Finding the Fourth Proportional to 15,771.46, 21,764.64 and 8,601.39

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Solution

The fourth proportional to 15,771.46, 21,764.64 and 8,601.39 is: 11,869.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,771.46 : 21,764.64 = 8,601.39 : x
  2. Step 2: Convert to fraction form
    15,771.46/21,764.64 = 8,601.39/x
  3. Step 3: Cross multiply
    15,771.46x = 21,764.64 × 8,601.39
  4. Step 4: Simplify right side
    15,771.46x = 187,206,151.80
  5. Step 5: Solve for x
    x = 187,206,151.80/15,771.46
  6. Step 6: Final answer
    x = 11,869.93

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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.