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Finding the Fourth Proportional to 12,378.87, 17,084.07 and 7,074.45

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Solution

The fourth proportional to 12,378.87, 17,084.07 and 7,074.45 is: 9,763.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.87 : 17,084.07 = 7,074.45 : x
  2. Step 2: Convert to fraction form
    12,378.87/17,084.07 = 7,074.45/x
  3. Step 3: Cross multiply
    12,378.87x = 17,084.07 × 7,074.45
  4. Step 4: Simplify right side
    12,378.87x = 120,860,399.01
  5. Step 5: Solve for x
    x = 120,860,399.01/12,378.87
  6. Step 6: Final answer
    x = 9,763.44

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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.