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Finding the Fourth Proportional to 7,074.60, 9,762.66 and 3,930.99

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Solution

The fourth proportional to 7,074.60, 9,762.66 and 3,930.99 is: 5,424.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,074.60 : 9,762.66 = 3,930.99 : x
  2. Step 2: Convert to fraction form
    7,074.60/9,762.66 = 3,930.99/x
  3. Step 3: Cross multiply
    7,074.60x = 9,762.66 × 3,930.99
  4. Step 4: Simplify right side
    7,074.60x = 38,376,918.83
  5. Step 5: Solve for x
    x = 38,376,918.83/7,074.60
  6. Step 6: Final answer
    x = 5,424.61

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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.