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Finding the Fourth Proportional to 7,239.85, 10,878 and 4,608.57

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Solution

The fourth proportional to 7,239.85, 10,878 and 4,608.57 is: 6,924.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.85 : 10,878 = 4,608.57 : x
  2. Step 2: Convert to fraction form
    7,239.85/10,878 = 4,608.57/x
  3. Step 3: Cross multiply
    7,239.85x = 10,878 × 4,608.57
  4. Step 4: Simplify right side
    7,239.85x = 50,132,024.46
  5. Step 5: Solve for x
    x = 50,132,024.46/7,239.85
  6. Step 6: Final answer
    x = 6,924.46

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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.