Home / 20,980.13-31,465.35-5,986.96

Finding the Fourth Proportional to 20,980.13, 31,465.35 and 5,986.96

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Solution

The fourth proportional to 20,980.13, 31,465.35 and 5,986.96 is: 8,979.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.13 : 31,465.35 = 5,986.96 : x
  2. Step 2: Convert to fraction form
    20,980.13/31,465.35 = 5,986.96/x
  3. Step 3: Cross multiply
    20,980.13x = 31,465.35 × 5,986.96
  4. Step 4: Simplify right side
    20,980.13x = 188,381,713.17
  5. Step 5: Solve for x
    x = 188,381,713.17/20,980.13
  6. Step 6: Final answer
    x = 8,979.06

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1.5x scale

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.