Home / 20,393.86-28,143.96-11,442.01

Finding the Fourth Proportional to 20,393.86, 28,143.96 and 11,442.01

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Solution

The fourth proportional to 20,393.86, 28,143.96 and 11,442.01 is: 15,790.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.86 : 28,143.96 = 11,442.01 : x
  2. Step 2: Convert to fraction form
    20,393.86/28,143.96 = 11,442.01/x
  3. Step 3: Cross multiply
    20,393.86x = 28,143.96 × 11,442.01
  4. Step 4: Simplify right side
    20,393.86x = 322,023,273.83
  5. Step 5: Solve for x
    x = 322,023,273.83/20,393.86
  6. Step 6: Final answer
    x = 15,790.21

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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.