Home / 13,780.20-20,670.62-3,392.04

Finding the Fourth Proportional to 13,780.20, 20,670.62 and 3,392.04

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Solution

The fourth proportional to 13,780.20, 20,670.62 and 3,392.04 is: 5,088.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.20 : 20,670.62 = 3,392.04 : x
  2. Step 2: Convert to fraction form
    13,780.20/20,670.62 = 3,392.04/x
  3. Step 3: Cross multiply
    13,780.20x = 20,670.62 × 3,392.04
  4. Step 4: Simplify right side
    13,780.20x = 70,115,569.86
  5. Step 5: Solve for x
    x = 70,115,569.86/13,780.20
  6. Step 6: Final answer
    x = 5,088.14

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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.