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Finding the Fourth Proportional to 7,138.52, 9,854.88 and 4,450.55

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Solution

The fourth proportional to 7,138.52, 9,854.88 and 4,450.55 is: 6,144.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.52 : 9,854.88 = 4,450.55 : x
  2. Step 2: Convert to fraction form
    7,138.52/9,854.88 = 4,450.55/x
  3. Step 3: Cross multiply
    7,138.52x = 9,854.88 × 4,450.55
  4. Step 4: Simplify right side
    7,138.52x = 43,859,586.91
  5. Step 5: Solve for x
    x = 43,859,586.91/7,138.52
  6. Step 6: Final answer
    x = 6,144.08

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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.