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Finding the Fourth Proportional to 38,480.40, 57,655.80 and 18,716.40

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Solution

The fourth proportional to 38,480.40, 57,655.80 and 18,716.40 is: 28,043.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,480.40 : 57,655.80 = 18,716.40 : x
  2. Step 2: Convert to fraction form
    38,480.40/57,655.80 = 18,716.40/x
  3. Step 3: Cross multiply
    38,480.40x = 57,655.80 × 18,716.40
  4. Step 4: Simplify right side
    38,480.40x = 1,079,109,015.12
  5. Step 5: Solve for x
    x = 1,079,109,015.12/38,480.40
  6. Step 6: Final answer
    x = 28,043.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.