Home / 20,988.22-31,487.77-9,298.66

Finding the Fourth Proportional to 20,988.22, 31,487.77 and 9,298.66

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Solution

The fourth proportional to 20,988.22, 31,487.77 and 9,298.66 is: 13,950.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.22 : 31,487.77 = 9,298.66 : x
  2. Step 2: Convert to fraction form
    20,988.22/31,487.77 = 9,298.66/x
  3. Step 3: Cross multiply
    20,988.22x = 31,487.77 × 9,298.66
  4. Step 4: Simplify right side
    20,988.22x = 292,794,067.39
  5. Step 5: Solve for x
    x = 292,794,067.39/20,988.22
  6. Step 6: Final answer
    x = 13,950.40

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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.