Home / 20,218.08-30,327.12-12,412.80

Finding the Fourth Proportional to 20,218.08, 30,327.12 and 12,412.80

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Solution

The fourth proportional to 20,218.08, 30,327.12 and 12,412.80 is: 18,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.08 : 30,327.12 = 12,412.80 : x
  2. Step 2: Convert to fraction form
    20,218.08/30,327.12 = 12,412.80/x
  3. Step 3: Cross multiply
    20,218.08x = 30,327.12 × 12,412.80
  4. Step 4: Simplify right side
    20,218.08x = 376,444,475.14
  5. Step 5: Solve for x
    x = 376,444,475.14/20,218.08
  6. Step 6: Final answer
    x = 18,619.20

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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.