Home / 20,772.90-28,665.39-11,339.58

Finding the Fourth Proportional to 20,772.90, 28,665.39 and 11,339.58

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Solution

The fourth proportional to 20,772.90, 28,665.39 and 11,339.58 is: 15,647.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.90 : 28,665.39 = 11,339.58 : x
  2. Step 2: Convert to fraction form
    20,772.90/28,665.39 = 11,339.58/x
  3. Step 3: Cross multiply
    20,772.90x = 28,665.39 × 11,339.58
  4. Step 4: Simplify right side
    20,772.90x = 325,053,483.14
  5. Step 5: Solve for x
    x = 325,053,483.14/20,772.90
  6. Step 6: Final answer
    x = 15,647.96

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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.