Home / 6,631-9,921.78-4,000.12

Finding the Fourth Proportional to 6,631, 9,921.78 and 4,000.12

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Solution

The fourth proportional to 6,631, 9,921.78 and 4,000.12 is: 5,985.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,631 : 9,921.78 = 4,000.12 : x
  2. Step 2: Convert to fraction form
    6,631/9,921.78 = 4,000.12/x
  3. Step 3: Cross multiply
    6,631x = 9,921.78 × 4,000.12
  4. Step 4: Simplify right side
    6,631x = 39,688,310.61
  5. Step 5: Solve for x
    x = 39,688,310.61/6,631
  6. Step 6: Final answer
    x = 5,985.27

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1.5x scale

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.