Home / 9,378.63-12,942.51-5,186.88

Finding the Fourth Proportional to 9,378.63, 12,942.51 and 5,186.88

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Solution

The fourth proportional to 9,378.63, 12,942.51 and 5,186.88 is: 7,157.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.63 : 12,942.51 = 5,186.88 : x
  2. Step 2: Convert to fraction form
    9,378.63/12,942.51 = 5,186.88/x
  3. Step 3: Cross multiply
    9,378.63x = 12,942.51 × 5,186.88
  4. Step 4: Simplify right side
    9,378.63x = 67,131,181.56
  5. Step 5: Solve for x
    x = 67,131,181.56/9,378.63
  6. Step 6: Final answer
    x = 7,157.89

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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.