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Finding the Fourth Proportional to 10,679.20, 15,975.60 and 9,383.20

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Solution

The fourth proportional to 10,679.20, 15,975.60 and 9,383.20 is: 14,036.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,679.20 : 15,975.60 = 9,383.20 : x
  2. Step 2: Convert to fraction form
    10,679.20/15,975.60 = 9,383.20/x
  3. Step 3: Cross multiply
    10,679.20x = 15,975.60 × 9,383.20
  4. Step 4: Simplify right side
    10,679.20x = 149,902,249.92
  5. Step 5: Solve for x
    x = 149,902,249.92/10,679.20
  6. Step 6: Final answer
    x = 14,036.84

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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.