Home / 20,769.66-31,135.95-7,618.95

Finding the Fourth Proportional to 20,769.66, 31,135.95 and 7,618.95

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Solution

The fourth proportional to 20,769.66, 31,135.95 and 7,618.95 is: 11,421.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.66 : 31,135.95 = 7,618.95 : x
  2. Step 2: Convert to fraction form
    20,769.66/31,135.95 = 7,618.95/x
  3. Step 3: Cross multiply
    20,769.66x = 31,135.95 × 7,618.95
  4. Step 4: Simplify right side
    20,769.66x = 237,223,246.25
  5. Step 5: Solve for x
    x = 237,223,246.25/20,769.66
  6. Step 6: Final answer
    x = 11,421.62

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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.