Home / 20,395.48-28,145.58-11,442.79

Finding the Fourth Proportional to 20,395.48, 28,145.58 and 11,442.79

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Solution

The fourth proportional to 20,395.48, 28,145.58 and 11,442.79 is: 15,790.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.48 : 28,145.58 = 11,442.79 : x
  2. Step 2: Convert to fraction form
    20,395.48/28,145.58 = 11,442.79/x
  3. Step 3: Cross multiply
    20,395.48x = 28,145.58 × 11,442.79
  4. Step 4: Simplify right side
    20,395.48x = 322,063,961.37
  5. Step 5: Solve for x
    x = 322,063,961.37/20,395.48
  6. Step 6: Final answer
    x = 15,790.95

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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.