Home / 30,218.20-45,309.30-18,539.80

Finding the Fourth Proportional to 30,218.20, 45,309.30 and 18,539.80

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Solution

The fourth proportional to 30,218.20, 45,309.30 and 18,539.80 is: 27,798.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,218.20 : 45,309.30 = 18,539.80 : x
  2. Step 2: Convert to fraction form
    30,218.20/45,309.30 = 18,539.80/x
  3. Step 3: Cross multiply
    30,218.20x = 45,309.30 × 18,539.80
  4. Step 4: Simplify right side
    30,218.20x = 840,025,360.14
  5. Step 5: Solve for x
    x = 840,025,360.14/30,218.20
  6. Step 6: Final answer
    x = 27,798.66

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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.