Home / 13,670.38-20,505.59-3,809.92

Finding the Fourth Proportional to 13,670.38, 20,505.59 and 3,809.92

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Solution

The fourth proportional to 13,670.38, 20,505.59 and 3,809.92 is: 5,714.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.38 : 20,505.59 = 3,809.92 : x
  2. Step 2: Convert to fraction form
    13,670.38/20,505.59 = 3,809.92/x
  3. Step 3: Cross multiply
    13,670.38x = 20,505.59 × 3,809.92
  4. Step 4: Simplify right side
    13,670.38x = 78,124,657.45
  5. Step 5: Solve for x
    x = 78,124,657.45/13,670.38
  6. Step 6: Final answer
    x = 5,714.89

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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.