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Finding the Fourth Proportional to 57,354.53, 86,031.81 and 17,911.80

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Solution

The fourth proportional to 57,354.53, 86,031.81 and 17,911.80 is: 26,867.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,354.53 : 86,031.81 = 17,911.80 : x
  2. Step 2: Convert to fraction form
    57,354.53/86,031.81 = 17,911.80/x
  3. Step 3: Cross multiply
    57,354.53x = 86,031.81 × 17,911.80
  4. Step 4: Simplify right side
    57,354.53x = 1,540,984,574.36
  5. Step 5: Solve for x
    x = 1,540,984,574.36/57,354.53
  6. Step 6: Final answer
    x = 26,867.71

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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.