Home / 20,684.82-28,545-11,253.36

Finding the Fourth Proportional to 20,684.82, 28,545 and 11,253.36

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Solution

The fourth proportional to 20,684.82, 28,545 and 11,253.36 is: 15,529.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,684.82 : 28,545 = 11,253.36 : x
  2. Step 2: Convert to fraction form
    20,684.82/28,545 = 11,253.36/x
  3. Step 3: Cross multiply
    20,684.82x = 28,545 × 11,253.36
  4. Step 4: Simplify right side
    20,684.82x = 321,227,161.20
  5. Step 5: Solve for x
    x = 321,227,161.20/20,684.82
  6. Step 6: Final answer
    x = 15,529.61

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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.