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Finding the Fourth Proportional to 39,859.16, 55,006.02 and 21,954.23

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Solution

The fourth proportional to 39,859.16, 55,006.02 and 21,954.23 is: 30,297.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,859.16 : 55,006.02 = 21,954.23 : x
  2. Step 2: Convert to fraction form
    39,859.16/55,006.02 = 21,954.23/x
  3. Step 3: Cross multiply
    39,859.16x = 55,006.02 × 21,954.23
  4. Step 4: Simplify right side
    39,859.16x = 1,207,614,897.09
  5. Step 5: Solve for x
    x = 1,207,614,897.09/39,859.16
  6. Step 6: Final answer
    x = 30,297.05

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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.