Home / 20,433.84-28,197.90-12,489.36

Finding the Fourth Proportional to 20,433.84, 28,197.90 and 12,489.36

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Solution

The fourth proportional to 20,433.84, 28,197.90 and 12,489.36 is: 17,234.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,433.84 : 28,197.90 = 12,489.36 : x
  2. Step 2: Convert to fraction form
    20,433.84/28,197.90 = 12,489.36/x
  3. Step 3: Cross multiply
    20,433.84x = 28,197.90 × 12,489.36
  4. Step 4: Simplify right side
    20,433.84x = 352,173,724.34
  5. Step 5: Solve for x
    x = 352,173,724.34/20,433.84
  6. Step 6: Final answer
    x = 17,234.83

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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.