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Finding the Fourth Proportional to 15,388.21, 23,074.62 and 7,990.62

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Solution

The fourth proportional to 15,388.21, 23,074.62 and 7,990.62 is: 11,981.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,388.21 : 23,074.62 = 7,990.62 : x
  2. Step 2: Convert to fraction form
    15,388.21/23,074.62 = 7,990.62/x
  3. Step 3: Cross multiply
    15,388.21x = 23,074.62 × 7,990.62
  4. Step 4: Simplify right side
    15,388.21x = 184,380,520.06
  5. Step 5: Solve for x
    x = 184,380,520.06/15,388.21
  6. Step 6: Final answer
    x = 11,981.93

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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.