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Finding the Fourth Proportional to 18,401.67, 27,590.49 and 7,878.51

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Solution

The fourth proportional to 18,401.67, 27,590.49 and 7,878.51 is: 11,812.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,401.67 : 27,590.49 = 7,878.51 : x
  2. Step 2: Convert to fraction form
    18,401.67/27,590.49 = 7,878.51/x
  3. Step 3: Cross multiply
    18,401.67x = 27,590.49 × 7,878.51
  4. Step 4: Simplify right side
    18,401.67x = 217,371,951.37
  5. Step 5: Solve for x
    x = 217,371,951.37/18,401.67
  6. Step 6: Final answer
    x = 11,812.62

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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.