Home / 10,643.10-15,982.44-6,649.78

Finding the Fourth Proportional to 10,643.10, 15,982.44 and 6,649.78

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Solution

The fourth proportional to 10,643.10, 15,982.44 and 6,649.78 is: 9,985.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,643.10 : 15,982.44 = 6,649.78 : x
  2. Step 2: Convert to fraction form
    10,643.10/15,982.44 = 6,649.78/x
  3. Step 3: Cross multiply
    10,643.10x = 15,982.44 × 6,649.78
  4. Step 4: Simplify right side
    10,643.10x = 106,279,669.91
  5. Step 5: Solve for x
    x = 106,279,669.91/10,643.10
  6. Step 6: Final answer
    x = 9,985.78

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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.