Home / 20,238.86-27,928.94-12,689.26

Finding the Fourth Proportional to 20,238.86, 27,928.94 and 12,689.26

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Solution

The fourth proportional to 20,238.86, 27,928.94 and 12,689.26 is: 17,510.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,238.86 : 27,928.94 = 12,689.26 : x
  2. Step 2: Convert to fraction form
    20,238.86/27,928.94 = 12,689.26/x
  3. Step 3: Cross multiply
    20,238.86x = 27,928.94 × 12,689.26
  4. Step 4: Simplify right side
    20,238.86x = 354,397,447.92
  5. Step 5: Solve for x
    x = 354,397,447.92/20,238.86
  6. Step 6: Final answer
    x = 17,510.74

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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.