Home / 28,380.38-39,165.93-15,805.13

Finding the Fourth Proportional to 28,380.38, 39,165.93 and 15,805.13

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Solution

The fourth proportional to 28,380.38, 39,165.93 and 15,805.13 is: 21,811.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.38 : 39,165.93 = 15,805.13 : x
  2. Step 2: Convert to fraction form
    28,380.38/39,165.93 = 15,805.13/x
  3. Step 3: Cross multiply
    28,380.38x = 39,165.93 × 15,805.13
  4. Step 4: Simplify right side
    28,380.38x = 619,022,419.39
  5. Step 5: Solve for x
    x = 619,022,419.39/28,380.38
  6. Step 6: Final answer
    x = 21,811.64

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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.