Home / 20,604.42-28,434.01-11,172.98

Finding the Fourth Proportional to 20,604.42, 28,434.01 and 11,172.98

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Solution

The fourth proportional to 20,604.42, 28,434.01 and 11,172.98 is: 15,418.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604.42 : 28,434.01 = 11,172.98 : x
  2. Step 2: Convert to fraction form
    20,604.42/28,434.01 = 11,172.98/x
  3. Step 3: Cross multiply
    20,604.42x = 28,434.01 × 11,172.98
  4. Step 4: Simplify right side
    20,604.42x = 317,692,625.05
  5. Step 5: Solve for x
    x = 317,692,625.05/20,604.42
  6. Step 6: Final answer
    x = 15,418.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.