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Finding the Fourth Proportional to 39,859.66, 55,008.82 and 21,954.66

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Solution

The fourth proportional to 39,859.66, 55,008.82 and 21,954.66 is: 30,298.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,859.66 : 55,008.82 = 21,954.66 : x
  2. Step 2: Convert to fraction form
    39,859.66/55,008.82 = 21,954.66/x
  3. Step 3: Cross multiply
    39,859.66x = 55,008.82 × 21,954.66
  4. Step 4: Simplify right side
    39,859.66x = 1,207,699,940.10
  5. Step 5: Solve for x
    x = 1,207,699,940.10/39,859.66
  6. Step 6: Final answer
    x = 30,298.80

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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.