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Finding the Fourth Proportional to 7,074.75, 9,763.56 and 3,931.14

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Solution

The fourth proportional to 7,074.75, 9,763.56 and 3,931.14 is: 5,425.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,074.75 : 9,763.56 = 3,931.14 : x
  2. Step 2: Convert to fraction form
    7,074.75/9,763.56 = 3,931.14/x
  3. Step 3: Cross multiply
    7,074.75x = 9,763.56 × 3,931.14
  4. Step 4: Simplify right side
    7,074.75x = 38,381,921.26
  5. Step 5: Solve for x
    x = 38,381,921.26/7,074.75
  6. Step 6: Final answer
    x = 5,425.20

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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.