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Finding the Fourth Proportional to 20,891.99, 31,340.91 and 6,101.99

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Solution

The fourth proportional to 20,891.99, 31,340.91 and 6,101.99 is: 9,153.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.99 : 31,340.91 = 6,101.99 : x
  2. Step 2: Convert to fraction form
    20,891.99/31,340.91 = 6,101.99/x
  3. Step 3: Cross multiply
    20,891.99x = 31,340.91 × 6,101.99
  4. Step 4: Simplify right side
    20,891.99x = 191,241,919.41
  5. Step 5: Solve for x
    x = 191,241,919.41/20,891.99
  6. Step 6: Final answer
    x = 9,153.84

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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.