Home / 11,115.42-15,342.39-6,401.58

Finding the Fourth Proportional to 11,115.42, 15,342.39 and 6,401.58

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Solution

The fourth proportional to 11,115.42, 15,342.39 and 6,401.58 is: 8,835.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.42 : 15,342.39 = 6,401.58 : x
  2. Step 2: Convert to fraction form
    11,115.42/15,342.39 = 6,401.58/x
  3. Step 3: Cross multiply
    11,115.42x = 15,342.39 × 6,401.58
  4. Step 4: Simplify right side
    11,115.42x = 98,215,536.98
  5. Step 5: Solve for x
    x = 98,215,536.98/11,115.42
  6. Step 6: Final answer
    x = 8,835.97

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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.