Home / 28,289.13-39,040.22-15,713.88

Finding the Fourth Proportional to 28,289.13, 39,040.22 and 15,713.88

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Solution

The fourth proportional to 28,289.13, 39,040.22 and 15,713.88 is: 21,685.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,289.13 : 39,040.22 = 15,713.88 : x
  2. Step 2: Convert to fraction form
    28,289.13/39,040.22 = 15,713.88/x
  3. Step 3: Cross multiply
    28,289.13x = 39,040.22 × 15,713.88
  4. Step 4: Simplify right side
    28,289.13x = 613,473,332.25
  5. Step 5: Solve for x
    x = 613,473,332.25/28,289.13
  6. Step 6: Final answer
    x = 21,685.83

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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.