Home / 20,575.14-28,393.68-11,143.68

Finding the Fourth Proportional to 20,575.14, 28,393.68 and 11,143.68

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Solution

The fourth proportional to 20,575.14, 28,393.68 and 11,143.68 is: 15,378.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,575.14 : 28,393.68 = 11,143.68 : x
  2. Step 2: Convert to fraction form
    20,575.14/28,393.68 = 11,143.68/x
  3. Step 3: Cross multiply
    20,575.14x = 28,393.68 × 11,143.68
  4. Step 4: Simplify right side
    20,575.14x = 316,410,083.94
  5. Step 5: Solve for x
    x = 316,410,083.94/20,575.14
  6. Step 6: Final answer
    x = 15,378.27

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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.