Home / 20,786.91-28,677.45-15,349.01

Finding the Fourth Proportional to 20,786.91, 28,677.45 and 15,349.01

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Solution

The fourth proportional to 20,786.91, 28,677.45 and 15,349.01 is: 21,175.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.91 : 28,677.45 = 15,349.01 : x
  2. Step 2: Convert to fraction form
    20,786.91/28,677.45 = 15,349.01/x
  3. Step 3: Cross multiply
    20,786.91x = 28,677.45 × 15,349.01
  4. Step 4: Simplify right side
    20,786.91x = 440,170,525.83
  5. Step 5: Solve for x
    x = 440,170,525.83/20,786.91
  6. Step 6: Final answer
    x = 21,175.37

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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.