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Finding the Fourth Proportional to 15,710.20, 21,679.92 and 11,694.98

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Solution

The fourth proportional to 15,710.20, 21,679.92 and 11,694.98 is: 16,138.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.20 : 21,679.92 = 11,694.98 : x
  2. Step 2: Convert to fraction form
    15,710.20/21,679.92 = 11,694.98/x
  3. Step 3: Cross multiply
    15,710.20x = 21,679.92 × 11,694.98
  4. Step 4: Simplify right side
    15,710.20x = 253,546,355.96
  5. Step 5: Solve for x
    x = 253,546,355.96/15,710.20
  6. Step 6: Final answer
    x = 16,138.96

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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.