Home / 6,642-9,961.92-4,688.28

Finding the Fourth Proportional to 6,642, 9,961.92 and 4,688.28

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Solution

The fourth proportional to 6,642, 9,961.92 and 4,688.28 is: 7,031.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,642 : 9,961.92 = 4,688.28 : x
  2. Step 2: Convert to fraction form
    6,642/9,961.92 = 4,688.28/x
  3. Step 3: Cross multiply
    6,642x = 9,961.92 × 4,688.28
  4. Step 4: Simplify right side
    6,642x = 46,704,270.30
  5. Step 5: Solve for x
    x = 46,704,270.30/6,642
  6. Step 6: Final answer
    x = 7,031.66

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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.