Home / 20,278.78-30,402.07-13,302.25

Finding the Fourth Proportional to 20,278.78, 30,402.07 and 13,302.25

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Solution

The fourth proportional to 20,278.78, 30,402.07 and 13,302.25 is: 19,942.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.78 : 30,402.07 = 13,302.25 : x
  2. Step 2: Convert to fraction form
    20,278.78/30,402.07 = 13,302.25/x
  3. Step 3: Cross multiply
    20,278.78x = 30,402.07 × 13,302.25
  4. Step 4: Simplify right side
    20,278.78x = 404,415,826.40
  5. Step 5: Solve for x
    x = 404,415,826.40/20,278.78
  6. Step 6: Final answer
    x = 19,942.81

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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.