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Finding the Fourth Proportional to 7,074.80, 9,919.30 and 7,074.80

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Solution

The fourth proportional to 7,074.80, 9,919.30 and 7,074.80 is: 9,919.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,074.80 : 9,919.30 = 7,074.80 : x
  2. Step 2: Convert to fraction form
    7,074.80/9,919.30 = 7,074.80/x
  3. Step 3: Cross multiply
    7,074.80x = 9,919.30 × 7,074.80
  4. Step 4: Simplify right side
    7,074.80x = 70,177,063.64
  5. Step 5: Solve for x
    x = 70,177,063.64/7,074.80
  6. Step 6: Final answer
    x = 9,919.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.