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Finding the Fourth Proportional to 20,736, 28,625.90 and 14,367.42

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Solution

The fourth proportional to 20,736, 28,625.90 and 14,367.42 is: 19,834.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736 : 28,625.90 = 14,367.42 : x
  2. Step 2: Convert to fraction form
    20,736/28,625.90 = 14,367.42/x
  3. Step 3: Cross multiply
    20,736x = 28,625.90 × 14,367.42
  4. Step 4: Simplify right side
    20,736x = 411,280,256.34
  5. Step 5: Solve for x
    x = 411,280,256.34/20,736
  6. Step 6: Final answer
    x = 19,834.12

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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.