Home / 20,728.22-31,101.44-7,582.55

Finding the Fourth Proportional to 20,728.22, 31,101.44 and 7,582.55

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Solution

The fourth proportional to 20,728.22, 31,101.44 and 7,582.55 is: 11,377.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.22 : 31,101.44 = 7,582.55 : x
  2. Step 2: Convert to fraction form
    20,728.22/31,101.44 = 7,582.55/x
  3. Step 3: Cross multiply
    20,728.22x = 31,101.44 × 7,582.55
  4. Step 4: Simplify right side
    20,728.22x = 235,828,030.45
  5. Step 5: Solve for x
    x = 235,828,030.45/20,728.22
  6. Step 6: Final answer
    x = 11,377.15

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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.