Home / 38,121.28-52,611.03-21,129.20

Finding the Fourth Proportional to 38,121.28, 52,611.03 and 21,129.20

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Solution

The fourth proportional to 38,121.28, 52,611.03 and 21,129.20 is: 29,160.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,121.28 : 52,611.03 = 21,129.20 : x
  2. Step 2: Convert to fraction form
    38,121.28/52,611.03 = 21,129.20/x
  3. Step 3: Cross multiply
    38,121.28x = 52,611.03 × 21,129.20
  4. Step 4: Simplify right side
    38,121.28x = 1,111,628,869.43
  5. Step 5: Solve for x
    x = 1,111,628,869.43/38,121.28
  6. Step 6: Final answer
    x = 29,160.33

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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.