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Finding the Fourth Proportional to 5,148.85, 7,137.91 and 4,868.21

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Solution

The fourth proportional to 5,148.85, 7,137.91 and 4,868.21 is: 6,748.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,148.85 : 7,137.91 = 4,868.21 : x
  2. Step 2: Convert to fraction form
    5,148.85/7,137.91 = 4,868.21/x
  3. Step 3: Cross multiply
    5,148.85x = 7,137.91 × 4,868.21
  4. Step 4: Simplify right side
    5,148.85x = 34,748,833.97
  5. Step 5: Solve for x
    x = 34,748,833.97/5,148.85
  6. Step 6: Final answer
    x = 6,748.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.