Home / 20,405.78-28,160.02-11,452.44

Finding the Fourth Proportional to 20,405.78, 28,160.02 and 11,452.44

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Solution

The fourth proportional to 20,405.78, 28,160.02 and 11,452.44 is: 15,804.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.78 : 28,160.02 = 11,452.44 : x
  2. Step 2: Convert to fraction form
    20,405.78/28,160.02 = 11,452.44/x
  3. Step 3: Cross multiply
    20,405.78x = 28,160.02 × 11,452.44
  4. Step 4: Simplify right side
    20,405.78x = 322,500,939.45
  5. Step 5: Solve for x
    x = 322,500,939.45/20,405.78
  6. Step 6: Final answer
    x = 15,804.39

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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.