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Finding the Fourth Proportional to 7,125.98, 10,690.90 and 6,440.54

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Solution

The fourth proportional to 7,125.98, 10,690.90 and 6,440.54 is: 9,662.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.98 : 10,690.90 = 6,440.54 : x
  2. Step 2: Convert to fraction form
    7,125.98/10,690.90 = 6,440.54/x
  3. Step 3: Cross multiply
    7,125.98x = 10,690.90 × 6,440.54
  4. Step 4: Simplify right side
    7,125.98x = 68,855,169.09
  5. Step 5: Solve for x
    x = 68,855,169.09/7,125.98
  6. Step 6: Final answer
    x = 9,662.55

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1.5x scale

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.