Home / 20,412.40-30,586.20-13,478.80

Finding the Fourth Proportional to 20,412.40, 30,586.20 and 13,478.80

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Solution

The fourth proportional to 20,412.40, 30,586.20 and 13,478.80 is: 20,196.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.40 : 30,586.20 = 13,478.80 : x
  2. Step 2: Convert to fraction form
    20,412.40/30,586.20 = 13,478.80/x
  3. Step 3: Cross multiply
    20,412.40x = 30,586.20 × 13,478.80
  4. Step 4: Simplify right side
    20,412.40x = 412,265,272.56
  5. Step 5: Solve for x
    x = 412,265,272.56/20,412.40
  6. Step 6: Final answer
    x = 20,196.81

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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.