Home / 20,364.78-28,103.14-11,412.24

Finding the Fourth Proportional to 20,364.78, 28,103.14 and 11,412.24

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Solution

The fourth proportional to 20,364.78, 28,103.14 and 11,412.24 is: 15,748.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,364.78 : 28,103.14 = 11,412.24 : x
  2. Step 2: Convert to fraction form
    20,364.78/28,103.14 = 11,412.24/x
  3. Step 3: Cross multiply
    20,364.78x = 28,103.14 × 11,412.24
  4. Step 4: Simplify right side
    20,364.78x = 320,719,778.43
  5. Step 5: Solve for x
    x = 320,719,778.43/20,364.78
  6. Step 6: Final answer
    x = 15,748.75

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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.