Home / 20,986.80-31,491.13-9,297.28

Finding the Fourth Proportional to 20,986.80, 31,491.13 and 9,297.28

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Solution

The fourth proportional to 20,986.80, 31,491.13 and 9,297.28 is: 13,950.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.80 : 31,491.13 = 9,297.28 : x
  2. Step 2: Convert to fraction form
    20,986.80/31,491.13 = 9,297.28/x
  3. Step 3: Cross multiply
    20,986.80x = 31,491.13 × 9,297.28
  4. Step 4: Simplify right side
    20,986.80x = 292,781,886.68
  5. Step 5: Solve for x
    x = 292,781,886.68/20,986.80
  6. Step 6: Final answer
    x = 13,950.77

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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.