Home / 6,639-9,161.50-3,985.88

Finding the Fourth Proportional to 6,639, 9,161.50 and 3,985.88

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Solution

The fourth proportional to 6,639, 9,161.50 and 3,985.88 is: 5,500.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639 : 9,161.50 = 3,985.88 : x
  2. Step 2: Convert to fraction form
    6,639/9,161.50 = 3,985.88/x
  3. Step 3: Cross multiply
    6,639x = 9,161.50 × 3,985.88
  4. Step 4: Simplify right side
    6,639x = 36,516,639.62
  5. Step 5: Solve for x
    x = 36,516,639.62/6,639
  6. Step 6: Final answer
    x = 5,500.32

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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.