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Finding the Fourth Proportional to 28,338.88, 42,471.12 and 15,858.40

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Solution

The fourth proportional to 28,338.88, 42,471.12 and 15,858.40 is: 23,766.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,338.88 : 42,471.12 = 15,858.40 : x
  2. Step 2: Convert to fraction form
    28,338.88/42,471.12 = 15,858.40/x
  3. Step 3: Cross multiply
    28,338.88x = 42,471.12 × 15,858.40
  4. Step 4: Simplify right side
    28,338.88x = 673,524,009.41
  5. Step 5: Solve for x
    x = 673,524,009.41/28,338.88
  6. Step 6: Final answer
    x = 23,766.78

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1.5x scale

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.