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Finding the Fourth Proportional to 8,626.86, 11,918.04 and 5,649.84

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Solution

The fourth proportional to 8,626.86, 11,918.04 and 5,649.84 is: 7,805.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,626.86 : 11,918.04 = 5,649.84 : x
  2. Step 2: Convert to fraction form
    8,626.86/11,918.04 = 5,649.84/x
  3. Step 3: Cross multiply
    8,626.86x = 11,918.04 × 5,649.84
  4. Step 4: Simplify right side
    8,626.86x = 67,335,019.11
  5. Step 5: Solve for x
    x = 67,335,019.11/8,626.86
  6. Step 6: Final answer
    x = 7,805.28

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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.