Home / 39,929.90-55,103.00-21,781.62

Finding the Fourth Proportional to 39,929.90, 55,103.00 and 21,781.62

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Solution

The fourth proportional to 39,929.90, 55,103.00 and 21,781.62 is: 30,058.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,929.90 : 55,103.00 = 21,781.62 : x
  2. Step 2: Convert to fraction form
    39,929.90/55,103.00 = 21,781.62/x
  3. Step 3: Cross multiply
    39,929.90x = 55,103.00 × 21,781.62
  4. Step 4: Simplify right side
    39,929.90x = 1,200,232,497.95
  5. Step 5: Solve for x
    x = 1,200,232,497.95/39,929.90
  6. Step 6: Final answer
    x = 30,058.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.