Home / 20,429.22-30,622.50-13,855.80

Finding the Fourth Proportional to 20,429.22, 30,622.50 and 13,855.80

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Solution

The fourth proportional to 20,429.22, 30,622.50 and 13,855.80 is: 20,769.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.22 : 30,622.50 = 13,855.80 : x
  2. Step 2: Convert to fraction form
    20,429.22/30,622.50 = 13,855.80/x
  3. Step 3: Cross multiply
    20,429.22x = 30,622.50 × 13,855.80
  4. Step 4: Simplify right side
    20,429.22x = 424,299,235.50
  5. Step 5: Solve for x
    x = 424,299,235.50/20,429.22
  6. Step 6: Final answer
    x = 20,769.23

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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.