Home / 20,351.61-28,086.62-11,398.95

Finding the Fourth Proportional to 20,351.61, 28,086.62 and 11,398.95

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Solution

The fourth proportional to 20,351.61, 28,086.62 and 11,398.95 is: 15,731.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.61 : 28,086.62 = 11,398.95 : x
  2. Step 2: Convert to fraction form
    20,351.61/28,086.62 = 11,398.95/x
  3. Step 3: Cross multiply
    20,351.61x = 28,086.62 × 11,398.95
  4. Step 4: Simplify right side
    20,351.61x = 320,157,977.05
  5. Step 5: Solve for x
    x = 320,157,977.05/20,351.61
  6. Step 6: Final answer
    x = 15,731.33

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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.