Home / 20,772.32-28,665.80-11,340.89

Finding the Fourth Proportional to 20,772.32, 28,665.80 and 11,340.89

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Solution

The fourth proportional to 20,772.32, 28,665.80 and 11,340.89 is: 15,650.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.32 : 28,665.80 = 11,340.89 : x
  2. Step 2: Convert to fraction form
    20,772.32/28,665.80 = 11,340.89/x
  3. Step 3: Cross multiply
    20,772.32x = 28,665.80 × 11,340.89
  4. Step 4: Simplify right side
    20,772.32x = 325,095,553.93
  5. Step 5: Solve for x
    x = 325,095,553.93/20,772.32
  6. Step 6: Final answer
    x = 15,650.42

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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.