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Finding the Fourth Proportional to 7,178.44, 9,905.53 and 4,489.13

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Solution

The fourth proportional to 7,178.44, 9,905.53 and 4,489.13 is: 6,194.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,178.44 : 9,905.53 = 4,489.13 : x
  2. Step 2: Convert to fraction form
    7,178.44/9,905.53 = 4,489.13/x
  3. Step 3: Cross multiply
    7,178.44x = 9,905.53 × 4,489.13
  4. Step 4: Simplify right side
    7,178.44x = 44,467,252.42
  5. Step 5: Solve for x
    x = 44,467,252.42/7,178.44
  6. Step 6: Final answer
    x = 6,194.56

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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.