Home / 8,638.40-11,914.68-5,649.44

Finding the Fourth Proportional to 8,638.40, 11,914.68 and 5,649.44

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Solution

The fourth proportional to 8,638.40, 11,914.68 and 5,649.44 is: 7,792.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.40 : 11,914.68 = 5,649.44 : x
  2. Step 2: Convert to fraction form
    8,638.40/11,914.68 = 5,649.44/x
  3. Step 3: Cross multiply
    8,638.40x = 11,914.68 × 5,649.44
  4. Step 4: Simplify right side
    8,638.40x = 67,311,269.78
  5. Step 5: Solve for x
    x = 67,311,269.78/8,638.40
  6. Step 6: Final answer
    x = 7,792.10

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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.