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Finding the Fourth Proportional to 18,139.74, 27,220.12 and 7,608.82

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Solution

The fourth proportional to 18,139.74, 27,220.12 and 7,608.82 is: 11,417.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.74 : 27,220.12 = 7,608.82 : x
  2. Step 2: Convert to fraction form
    18,139.74/27,220.12 = 7,608.82/x
  3. Step 3: Cross multiply
    18,139.74x = 27,220.12 × 7,608.82
  4. Step 4: Simplify right side
    18,139.74x = 207,112,993.46
  5. Step 5: Solve for x
    x = 207,112,993.46/18,139.74
  6. Step 6: Final answer
    x = 11,417.64

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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.