Home / 28,707.11-39,616.26-15,786.92

Finding the Fourth Proportional to 28,707.11, 39,616.26 and 15,786.92

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Solution

The fourth proportional to 28,707.11, 39,616.26 and 15,786.92 is: 21,786.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,707.11 : 39,616.26 = 15,786.92 : x
  2. Step 2: Convert to fraction form
    28,707.11/39,616.26 = 15,786.92/x
  3. Step 3: Cross multiply
    28,707.11x = 39,616.26 × 15,786.92
  4. Step 4: Simplify right side
    28,707.11x = 625,418,727.32
  5. Step 5: Solve for x
    x = 625,418,727.32/28,707.11
  6. Step 6: Final answer
    x = 21,786.20

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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.