Home / 20,357.40-30,536.10-13,381.80

Finding the Fourth Proportional to 20,357.40, 30,536.10 and 13,381.80

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Solution

The fourth proportional to 20,357.40, 30,536.10 and 13,381.80 is: 20,072.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.40 : 30,536.10 = 13,381.80 : x
  2. Step 2: Convert to fraction form
    20,357.40/30,536.10 = 13,381.80/x
  3. Step 3: Cross multiply
    20,357.40x = 30,536.10 × 13,381.80
  4. Step 4: Simplify right side
    20,357.40x = 408,627,982.98
  5. Step 5: Solve for x
    x = 408,627,982.98/20,357.40
  6. Step 6: Final answer
    x = 20,072.70

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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.