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Finding the Fourth Proportional to 18,020.54, 27,030.74 and 4,872.91

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Solution

The fourth proportional to 18,020.54, 27,030.74 and 4,872.91 is: 7,309.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,020.54 : 27,030.74 = 4,872.91 : x
  2. Step 2: Convert to fraction form
    18,020.54/27,030.74 = 4,872.91/x
  3. Step 3: Cross multiply
    18,020.54x = 27,030.74 × 4,872.91
  4. Step 4: Simplify right side
    18,020.54x = 131,718,363.25
  5. Step 5: Solve for x
    x = 131,718,363.25/18,020.54
  6. Step 6: Final answer
    x = 7,309.35

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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.