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Finding the Fourth Proportional to 43,802.70, 65,628.45 and 20,381.10

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Solution

The fourth proportional to 43,802.70, 65,628.45 and 20,381.10 is: 30,536.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,802.70 : 65,628.45 = 20,381.10 : x
  2. Step 2: Convert to fraction form
    43,802.70/65,628.45 = 20,381.10/x
  3. Step 3: Cross multiply
    43,802.70x = 65,628.45 × 20,381.10
  4. Step 4: Simplify right side
    43,802.70x = 1,337,580,002.30
  5. Step 5: Solve for x
    x = 1,337,580,002.30/43,802.70
  6. Step 6: Final answer
    x = 30,536.47

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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.