Home / 20,803.20-31,204.80-18,340.80

Finding the Fourth Proportional to 20,803.20, 31,204.80 and 18,340.80

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Solution

The fourth proportional to 20,803.20, 31,204.80 and 18,340.80 is: 27,511.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.20 : 31,204.80 = 18,340.80 : x
  2. Step 2: Convert to fraction form
    20,803.20/31,204.80 = 18,340.80/x
  3. Step 3: Cross multiply
    20,803.20x = 31,204.80 × 18,340.80
  4. Step 4: Simplify right side
    20,803.20x = 572,320,995.84
  5. Step 5: Solve for x
    x = 572,320,995.84/20,803.20
  6. Step 6: Final answer
    x = 27,511.20

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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.