Home / 13,981.32-20,972.19-4,120.86

Finding the Fourth Proportional to 13,981.32, 20,972.19 and 4,120.86

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Solution

The fourth proportional to 13,981.32, 20,972.19 and 4,120.86 is: 6,181.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.32 : 20,972.19 = 4,120.86 : x
  2. Step 2: Convert to fraction form
    13,981.32/20,972.19 = 4,120.86/x
  3. Step 3: Cross multiply
    13,981.32x = 20,972.19 × 4,120.86
  4. Step 4: Simplify right side
    13,981.32x = 86,423,458.88
  5. Step 5: Solve for x
    x = 86,423,458.88/13,981.32
  6. Step 6: Final answer
    x = 6,181.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.