Home / 21,412.86-32,035.32-18,919.68

Finding the Fourth Proportional to 21,412.86, 32,035.32 and 18,919.68

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Solution

The fourth proportional to 21,412.86, 32,035.32 and 18,919.68 is: 28,305.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,412.86 : 32,035.32 = 18,919.68 : x
  2. Step 2: Convert to fraction form
    21,412.86/32,035.32 = 18,919.68/x
  3. Step 3: Cross multiply
    21,412.86x = 32,035.32 × 18,919.68
  4. Step 4: Simplify right side
    21,412.86x = 606,098,003.10
  5. Step 5: Solve for x
    x = 606,098,003.10/21,412.86
  6. Step 6: Final answer
    x = 28,305.33

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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.