Home / 20,396.76-28,151.60-13,235.64

Finding the Fourth Proportional to 20,396.76, 28,151.60 and 13,235.64

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Solution

The fourth proportional to 20,396.76, 28,151.60 and 13,235.64 is: 18,267.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,396.76 : 28,151.60 = 13,235.64 : x
  2. Step 2: Convert to fraction form
    20,396.76/28,151.60 = 13,235.64/x
  3. Step 3: Cross multiply
    20,396.76x = 28,151.60 × 13,235.64
  4. Step 4: Simplify right side
    20,396.76x = 372,604,443.02
  5. Step 5: Solve for x
    x = 372,604,443.02/20,396.76
  6. Step 6: Final answer
    x = 18,267.83

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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.