Home / 20,218.12-30,326.10-5,426.80

Finding the Fourth Proportional to 20,218.12, 30,326.10 and 5,426.80

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Solution

The fourth proportional to 20,218.12, 30,326.10 and 5,426.80 is: 8,139.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.12 : 30,326.10 = 5,426.80 : x
  2. Step 2: Convert to fraction form
    20,218.12/30,326.10 = 5,426.80/x
  3. Step 3: Cross multiply
    20,218.12x = 30,326.10 × 5,426.80
  4. Step 4: Simplify right side
    20,218.12x = 164,573,679.48
  5. Step 5: Solve for x
    x = 164,573,679.48/20,218.12
  6. Step 6: Final answer
    x = 8,139.91

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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.