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Finding the Fourth Proportional to 15,591, 21,522.06 and 11,115.48

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Solution

The fourth proportional to 15,591, 21,522.06 and 11,115.48 is: 15,343.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,591 : 21,522.06 = 11,115.48 : x
  2. Step 2: Convert to fraction form
    15,591/21,522.06 = 11,115.48/x
  3. Step 3: Cross multiply
    15,591x = 21,522.06 × 11,115.48
  4. Step 4: Simplify right side
    15,591x = 239,228,027.49
  5. Step 5: Solve for x
    x = 239,228,027.49/15,591
  6. Step 6: Final answer
    x = 15,343.98

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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.