Home / 15,285.78-21,093.62-8,997.75

Finding the Fourth Proportional to 15,285.78, 21,093.62 and 8,997.75

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Solution

The fourth proportional to 15,285.78, 21,093.62 and 8,997.75 is: 12,416.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,285.78 : 21,093.62 = 8,997.75 : x
  2. Step 2: Convert to fraction form
    15,285.78/21,093.62 = 8,997.75/x
  3. Step 3: Cross multiply
    15,285.78x = 21,093.62 × 8,997.75
  4. Step 4: Simplify right side
    15,285.78x = 189,795,074.37
  5. Step 5: Solve for x
    x = 189,795,074.37/15,285.78
  6. Step 6: Final answer
    x = 12,416.45

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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.