Home / 21,239.69-31,863.37-8,752.77

Finding the Fourth Proportional to 21,239.69, 31,863.37 and 8,752.77

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Solution

The fourth proportional to 21,239.69, 31,863.37 and 8,752.77 is: 13,130.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.69 : 31,863.37 = 8,752.77 : x
  2. Step 2: Convert to fraction form
    21,239.69/31,863.37 = 8,752.77/x
  3. Step 3: Cross multiply
    21,239.69x = 31,863.37 × 8,752.77
  4. Step 4: Simplify right side
    21,239.69x = 278,892,727.15
  5. Step 5: Solve for x
    x = 278,892,727.15/21,239.69
  6. Step 6: Final answer
    x = 13,130.73

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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.