Home / 6,913.18-9,539.91-3,929.21

Finding the Fourth Proportional to 6,913.18, 9,539.91 and 3,929.21

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Solution

The fourth proportional to 6,913.18, 9,539.91 and 3,929.21 is: 5,422.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,913.18 : 9,539.91 = 3,929.21 : x
  2. Step 2: Convert to fraction form
    6,913.18/9,539.91 = 3,929.21/x
  3. Step 3: Cross multiply
    6,913.18x = 9,539.91 × 3,929.21
  4. Step 4: Simplify right side
    6,913.18x = 37,484,297.85
  5. Step 5: Solve for x
    x = 37,484,297.85/6,913.18
  6. Step 6: Final answer
    x = 5,422.15

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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.