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Finding the Fourth Proportional to 39,881.90, 59,801.90 and 17,685.68

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Solution

The fourth proportional to 39,881.90, 59,801.90 and 17,685.68 is: 26,519.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,881.90 : 59,801.90 = 17,685.68 : x
  2. Step 2: Convert to fraction form
    39,881.90/59,801.90 = 17,685.68/x
  3. Step 3: Cross multiply
    39,881.90x = 59,801.90 × 17,685.68
  4. Step 4: Simplify right side
    39,881.90x = 1,057,636,879.35
  5. Step 5: Solve for x
    x = 1,057,636,879.35/39,881.90
  6. Step 6: Final answer
    x = 26,519.22

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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.