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Finding the Fourth Proportional to 5,057.72, 6,981.79 and 3,168.89

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Solution

The fourth proportional to 5,057.72, 6,981.79 and 3,168.89 is: 4,374.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,057.72 : 6,981.79 = 3,168.89 : x
  2. Step 2: Convert to fraction form
    5,057.72/6,981.79 = 3,168.89/x
  3. Step 3: Cross multiply
    5,057.72x = 6,981.79 × 3,168.89
  4. Step 4: Simplify right side
    5,057.72x = 22,124,524.51
  5. Step 5: Solve for x
    x = 22,124,524.51/5,057.72
  6. Step 6: Final answer
    x = 4,374.41

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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.