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Finding the Fourth Proportional to 7,431, 10,254.78 and 4,119

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Solution

The fourth proportional to 7,431, 10,254.78 and 4,119 is: 5,684.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,431 : 10,254.78 = 4,119 : x
  2. Step 2: Convert to fraction form
    7,431/10,254.78 = 4,119/x
  3. Step 3: Cross multiply
    7,431x = 10,254.78 × 4,119
  4. Step 4: Simplify right side
    7,431x = 42,239,438.82
  5. Step 5: Solve for x
    x = 42,239,438.82/7,431
  6. Step 6: Final answer
    x = 5,684.22

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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.