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Finding the Fourth Proportional to 8,641.68, 11,919.96 and 5,104.68

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Solution

The fourth proportional to 8,641.68, 11,919.96 and 5,104.68 is: 7,041.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.68 : 11,919.96 = 5,104.68 : x
  2. Step 2: Convert to fraction form
    8,641.68/11,919.96 = 5,104.68/x
  3. Step 3: Cross multiply
    8,641.68x = 11,919.96 × 5,104.68
  4. Step 4: Simplify right side
    8,641.68x = 60,847,581.41
  5. Step 5: Solve for x
    x = 60,847,581.41/8,641.68
  6. Step 6: Final answer
    x = 7,041.18

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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.