Home / 20,078.20-27,712.52-13,364.12

Finding the Fourth Proportional to 20,078.20, 27,712.52 and 13,364.12

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Solution

The fourth proportional to 20,078.20, 27,712.52 and 13,364.12 is: 18,445.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.20 : 27,712.52 = 13,364.12 : x
  2. Step 2: Convert to fraction form
    20,078.20/27,712.52 = 13,364.12/x
  3. Step 3: Cross multiply
    20,078.20x = 27,712.52 × 13,364.12
  4. Step 4: Simplify right side
    20,078.20x = 370,353,442.78
  5. Step 5: Solve for x
    x = 370,353,442.78/20,078.20
  6. Step 6: Final answer
    x = 18,445.55

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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.