Home / 20,697.66-31,053.99-12,790.95

Finding the Fourth Proportional to 20,697.66, 31,053.99 and 12,790.95

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Solution

The fourth proportional to 20,697.66, 31,053.99 and 12,790.95 is: 19,191.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.66 : 31,053.99 = 12,790.95 : x
  2. Step 2: Convert to fraction form
    20,697.66/31,053.99 = 12,790.95/x
  3. Step 3: Cross multiply
    20,697.66x = 31,053.99 × 12,790.95
  4. Step 4: Simplify right side
    20,697.66x = 397,210,033.39
  5. Step 5: Solve for x
    x = 397,210,033.39/20,697.66
  6. Step 6: Final answer
    x = 19,191.06

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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.