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Finding the Fourth Proportional to 20,381.68, 30,550.36 and 8,543.08

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Solution

The fourth proportional to 20,381.68, 30,550.36 and 8,543.08 is: 12,805.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,381.68 : 30,550.36 = 8,543.08 : x
  2. Step 2: Convert to fraction form
    20,381.68/30,550.36 = 8,543.08/x
  3. Step 3: Cross multiply
    20,381.68x = 30,550.36 × 8,543.08
  4. Step 4: Simplify right side
    20,381.68x = 260,994,169.51
  5. Step 5: Solve for x
    x = 260,994,169.51/20,381.68
  6. Step 6: Final answer
    x = 12,805.33

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1.5x scale

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.