Home / 20,218.49-30,321.88-6,891.18

Finding the Fourth Proportional to 20,218.49, 30,321.88 and 6,891.18

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Solution

The fourth proportional to 20,218.49, 30,321.88 and 6,891.18 is: 10,334.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.49 : 30,321.88 = 6,891.18 : x
  2. Step 2: Convert to fraction form
    20,218.49/30,321.88 = 6,891.18/x
  3. Step 3: Cross multiply
    20,218.49x = 30,321.88 × 6,891.18
  4. Step 4: Simplify right side
    20,218.49x = 208,953,533.02
  5. Step 5: Solve for x
    x = 208,953,533.02/20,218.49
  6. Step 6: Final answer
    x = 10,334.77

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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.