Home / 20,212.40-30,320.40-8,523.92

Finding the Fourth Proportional to 20,212.40, 30,320.40 and 8,523.92

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Solution

The fourth proportional to 20,212.40, 30,320.40 and 8,523.92 is: 12,786.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212.40 : 30,320.40 = 8,523.92 : x
  2. Step 2: Convert to fraction form
    20,212.40/30,320.40 = 8,523.92/x
  3. Step 3: Cross multiply
    20,212.40x = 30,320.40 × 8,523.92
  4. Step 4: Simplify right side
    20,212.40x = 258,448,663.97
  5. Step 5: Solve for x
    x = 258,448,663.97/20,212.40
  6. Step 6: Final answer
    x = 12,786.64

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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.