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Finding the Fourth Proportional to 18,108.56, 27,166.08 and 7,721.12

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Solution

The fourth proportional to 18,108.56, 27,166.08 and 7,721.12 is: 11,583.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,108.56 : 27,166.08 = 7,721.12 : x
  2. Step 2: Convert to fraction form
    18,108.56/27,166.08 = 7,721.12/x
  3. Step 3: Cross multiply
    18,108.56x = 27,166.08 × 7,721.12
  4. Step 4: Simplify right side
    18,108.56x = 209,752,563.61
  5. Step 5: Solve for x
    x = 209,752,563.61/18,108.56
  6. Step 6: Final answer
    x = 11,583.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.