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Finding the Fourth Proportional to 20,543, 30,811.40 and 5,750

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Solution

The fourth proportional to 20,543, 30,811.40 and 5,750 is: 8,624.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543 : 30,811.40 = 5,750 : x
  2. Step 2: Convert to fraction form
    20,543/30,811.40 = 5,750/x
  3. Step 3: Cross multiply
    20,543x = 30,811.40 × 5,750
  4. Step 4: Simplify right side
    20,543x = 177,165,550
  5. Step 5: Solve for x
    x = 177,165,550/20,543
  6. Step 6: Final answer
    x = 8,624.13

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Why These Related Problems?

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