Home / 20,980.11-31,465.36-5,986.95

Finding the Fourth Proportional to 20,980.11, 31,465.36 and 5,986.95

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Solution

The fourth proportional to 20,980.11, 31,465.36 and 5,986.95 is: 8,979.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.11 : 31,465.36 = 5,986.95 : x
  2. Step 2: Convert to fraction form
    20,980.11/31,465.36 = 5,986.95/x
  3. Step 3: Cross multiply
    20,980.11x = 31,465.36 × 5,986.95
  4. Step 4: Simplify right side
    20,980.11x = 188,381,426.54
  5. Step 5: Solve for x
    x = 188,381,426.54/20,980.11
  6. Step 6: Final answer
    x = 8,979.05

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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.