Home / 28,288.88-39,039.90-15,713.64

Finding the Fourth Proportional to 28,288.88, 39,039.90 and 15,713.64

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Solution

The fourth proportional to 28,288.88, 39,039.90 and 15,713.64 is: 21,685.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,288.88 : 39,039.90 = 15,713.64 : x
  2. Step 2: Convert to fraction form
    28,288.88/39,039.90 = 15,713.64/x
  3. Step 3: Cross multiply
    28,288.88x = 39,039.90 × 15,713.64
  4. Step 4: Simplify right side
    28,288.88x = 613,458,934.24
  5. Step 5: Solve for x
    x = 613,458,934.24/28,288.88
  6. Step 6: Final answer
    x = 21,685.52

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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.