Home / 20,438.61-28,200.35-11,935.90

Finding the Fourth Proportional to 20,438.61, 28,200.35 and 11,935.90

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Solution

The fourth proportional to 20,438.61, 28,200.35 and 11,935.90 is: 16,468.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.61 : 28,200.35 = 11,935.90 : x
  2. Step 2: Convert to fraction form
    20,438.61/28,200.35 = 11,935.90/x
  3. Step 3: Cross multiply
    20,438.61x = 28,200.35 × 11,935.90
  4. Step 4: Simplify right side
    20,438.61x = 336,596,527.73
  5. Step 5: Solve for x
    x = 336,596,527.73/20,438.61
  6. Step 6: Final answer
    x = 16,468.66

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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.