Home / 13,885.14-20,809.83-5,109.66

Finding the Fourth Proportional to 13,885.14, 20,809.83 and 5,109.66

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Solution

The fourth proportional to 13,885.14, 20,809.83 and 5,109.66 is: 7,657.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,885.14 : 20,809.83 = 5,109.66 : x
  2. Step 2: Convert to fraction form
    13,885.14/20,809.83 = 5,109.66/x
  3. Step 3: Cross multiply
    13,885.14x = 20,809.83 × 5,109.66
  4. Step 4: Simplify right side
    13,885.14x = 106,331,155.96
  5. Step 5: Solve for x
    x = 106,331,155.96/13,885.14
  6. Step 6: Final answer
    x = 7,657.91

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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.