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Finding the Fourth Proportional to 8,642.70, 11,927.36 and 4,865.67

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Solution

The fourth proportional to 8,642.70, 11,927.36 and 4,865.67 is: 6,714.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.70 : 11,927.36 = 4,865.67 : x
  2. Step 2: Convert to fraction form
    8,642.70/11,927.36 = 4,865.67/x
  3. Step 3: Cross multiply
    8,642.70x = 11,927.36 × 4,865.67
  4. Step 4: Simplify right side
    8,642.70x = 58,034,609.90
  5. Step 5: Solve for x
    x = 58,034,609.90/8,642.70
  6. Step 6: Final answer
    x = 6,714.87

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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.