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Finding the Fourth Proportional to 17,919.47, 24,722.47 and 12,320.75

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Solution

The fourth proportional to 17,919.47, 24,722.47 and 12,320.75 is: 16,998.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,919.47 : 24,722.47 = 12,320.75 : x
  2. Step 2: Convert to fraction form
    17,919.47/24,722.47 = 12,320.75/x
  3. Step 3: Cross multiply
    17,919.47x = 24,722.47 × 12,320.75
  4. Step 4: Simplify right side
    17,919.47x = 304,599,372.25
  5. Step 5: Solve for x
    x = 304,599,372.25/17,919.47
  6. Step 6: Final answer
    x = 16,998.24

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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.