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Finding the Fourth Proportional to 5,451.42, 8,140.05 and 5,143.44

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Solution

The fourth proportional to 5,451.42, 8,140.05 and 5,143.44 is: 7,680.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,451.42 : 8,140.05 = 5,143.44 : x
  2. Step 2: Convert to fraction form
    5,451.42/8,140.05 = 5,143.44/x
  3. Step 3: Cross multiply
    5,451.42x = 8,140.05 × 5,143.44
  4. Step 4: Simplify right side
    5,451.42x = 41,867,858.77
  5. Step 5: Solve for x
    x = 41,867,858.77/5,451.42
  6. Step 6: Final answer
    x = 7,680.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.