Home / 20,538.58-28,341.12-15,163.86

Finding the Fourth Proportional to 20,538.58, 28,341.12 and 15,163.86

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Solution

The fourth proportional to 20,538.58, 28,341.12 and 15,163.86 is: 20,924.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.58 : 28,341.12 = 15,163.86 : x
  2. Step 2: Convert to fraction form
    20,538.58/28,341.12 = 15,163.86/x
  3. Step 3: Cross multiply
    20,538.58x = 28,341.12 × 15,163.86
  4. Step 4: Simplify right side
    20,538.58x = 429,760,775.92
  5. Step 5: Solve for x
    x = 429,760,775.92/20,538.58
  6. Step 6: Final answer
    x = 20,924.56

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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.