Home / 20,786.43-28,685.16-11,354.93

Finding the Fourth Proportional to 20,786.43, 28,685.16 and 11,354.93

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Solution

The fourth proportional to 20,786.43, 28,685.16 and 11,354.93 is: 15,669.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.43 : 28,685.16 = 11,354.93 : x
  2. Step 2: Convert to fraction form
    20,786.43/28,685.16 = 11,354.93/x
  3. Step 3: Cross multiply
    20,786.43x = 28,685.16 × 11,354.93
  4. Step 4: Simplify right side
    20,786.43x = 325,717,840.41
  5. Step 5: Solve for x
    x = 325,717,840.41/20,786.43
  6. Step 6: Final answer
    x = 15,669.73

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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.