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Finding the Fourth Proportional to 13,591.94, 20,387 and 3,730.40

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Solution

The fourth proportional to 13,591.94, 20,387 and 3,730.40 is: 5,595.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,591.94 : 20,387 = 3,730.40 : x
  2. Step 2: Convert to fraction form
    13,591.94/20,387 = 3,730.40/x
  3. Step 3: Cross multiply
    13,591.94x = 20,387 × 3,730.40
  4. Step 4: Simplify right side
    13,591.94x = 76,051,664.80
  5. Step 5: Solve for x
    x = 76,051,664.80/13,591.94
  6. Step 6: Final answer
    x = 5,595.35

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.