Home / 20,401.42-28,146.74-13,331.94

Finding the Fourth Proportional to 20,401.42, 28,146.74 and 13,331.94

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Solution

The fourth proportional to 20,401.42, 28,146.74 and 13,331.94 is: 18,393.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,401.42 : 28,146.74 = 13,331.94 : x
  2. Step 2: Convert to fraction form
    20,401.42/28,146.74 = 13,331.94/x
  3. Step 3: Cross multiply
    20,401.42x = 28,146.74 × 13,331.94
  4. Step 4: Simplify right side
    20,401.42x = 375,250,648.88
  5. Step 5: Solve for x
    x = 375,250,648.88/20,401.42
  6. Step 6: Final answer
    x = 18,393.36

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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.