Home / 28,757.32-39,686.00-15,661.19

Finding the Fourth Proportional to 28,757.32, 39,686.00 and 15,661.19

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Solution

The fourth proportional to 28,757.32, 39,686.00 and 15,661.19 is: 21,612.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,757.32 : 39,686.00 = 15,661.19 : x
  2. Step 2: Convert to fraction form
    28,757.32/39,686.00 = 15,661.19/x
  3. Step 3: Cross multiply
    28,757.32x = 39,686.00 × 15,661.19
  4. Step 4: Simplify right side
    28,757.32x = 621,530,007.25
  5. Step 5: Solve for x
    x = 621,530,007.25/28,757.32
  6. Step 6: Final answer
    x = 21,612.93

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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.