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Finding the Fourth Proportional to 20,543.76, 30,812.28 and 9,450

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Solution

The fourth proportional to 20,543.76, 30,812.28 and 9,450 is: 14,173.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.76 : 30,812.28 = 9,450 : x
  2. Step 2: Convert to fraction form
    20,543.76/30,812.28 = 9,450/x
  3. Step 3: Cross multiply
    20,543.76x = 30,812.28 × 9,450
  4. Step 4: Simplify right side
    20,543.76x = 291,176,046
  5. Step 5: Solve for x
    x = 291,176,046/20,543.76
  6. Step 6: Final answer
    x = 14,173.45

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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.