Home / 20,190.40-30,253.20-13,256.80

Finding the Fourth Proportional to 20,190.40, 30,253.20 and 13,256.80

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Solution

The fourth proportional to 20,190.40, 30,253.20 and 13,256.80 is: 19,863.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.40 : 30,253.20 = 13,256.80 : x
  2. Step 2: Convert to fraction form
    20,190.40/30,253.20 = 13,256.80/x
  3. Step 3: Cross multiply
    20,190.40x = 30,253.20 × 13,256.80
  4. Step 4: Simplify right side
    20,190.40x = 401,060,621.76
  5. Step 5: Solve for x
    x = 401,060,621.76/20,190.40
  6. Step 6: Final answer
    x = 19,863.93

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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.