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Finding the Fourth Proportional to 38,859.35, 53,629.02 and 21,862.58

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Solution

The fourth proportional to 38,859.35, 53,629.02 and 21,862.58 is: 30,172.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,859.35 : 53,629.02 = 21,862.58 : x
  2. Step 2: Convert to fraction form
    38,859.35/53,629.02 = 21,862.58/x
  3. Step 3: Cross multiply
    38,859.35x = 53,629.02 × 21,862.58
  4. Step 4: Simplify right side
    38,859.35x = 1,172,468,471.93
  5. Step 5: Solve for x
    x = 1,172,468,471.93/38,859.35
  6. Step 6: Final answer
    x = 30,172.11

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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.