Home / 28,361.91-39,139.68-15,786.66

Finding the Fourth Proportional to 28,361.91, 39,139.68 and 15,786.66

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Solution

The fourth proportional to 28,361.91, 39,139.68 and 15,786.66 is: 21,785.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,361.91 : 39,139.68 = 15,786.66 : x
  2. Step 2: Convert to fraction form
    28,361.91/39,139.68 = 15,786.66/x
  3. Step 3: Cross multiply
    28,361.91x = 39,139.68 × 15,786.66
  4. Step 4: Simplify right side
    28,361.91x = 617,884,820.67
  5. Step 5: Solve for x
    x = 617,884,820.67/28,361.91
  6. Step 6: Final answer
    x = 21,785.73

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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.