Home / 20,408.01-28,155.81-13,338.51

Finding the Fourth Proportional to 20,408.01, 28,155.81 and 13,338.51

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Solution

The fourth proportional to 20,408.01, 28,155.81 and 13,338.51 is: 18,402.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.01 : 28,155.81 = 13,338.51 : x
  2. Step 2: Convert to fraction form
    20,408.01/28,155.81 = 13,338.51/x
  3. Step 3: Cross multiply
    20,408.01x = 28,155.81 × 13,338.51
  4. Step 4: Simplify right side
    20,408.01x = 375,556,553.24
  5. Step 5: Solve for x
    x = 375,556,553.24/20,408.01
  6. Step 6: Final answer
    x = 18,402.41

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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.