Home / 10,982.20-15,143.32-6,997

Finding the Fourth Proportional to 10,982.20, 15,143.32 and 6,997

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Solution

The fourth proportional to 10,982.20, 15,143.32 and 6,997 is: 9,648.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,982.20 : 15,143.32 = 6,997 : x
  2. Step 2: Convert to fraction form
    10,982.20/15,143.32 = 6,997/x
  3. Step 3: Cross multiply
    10,982.20x = 15,143.32 × 6,997
  4. Step 4: Simplify right side
    10,982.20x = 105,957,810.04
  5. Step 5: Solve for x
    x = 105,957,810.04/10,982.20
  6. Step 6: Final answer
    x = 9,648.14

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1.5x scale

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.