Home / 13,454.13-20,189.70-5,135.04

Finding the Fourth Proportional to 13,454.13, 20,189.70 and 5,135.04

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Solution

The fourth proportional to 13,454.13, 20,189.70 and 5,135.04 is: 7,705.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,454.13 : 20,189.70 = 5,135.04 : x
  2. Step 2: Convert to fraction form
    13,454.13/20,189.70 = 5,135.04/x
  3. Step 3: Cross multiply
    13,454.13x = 20,189.70 × 5,135.04
  4. Step 4: Simplify right side
    13,454.13x = 103,674,917.09
  5. Step 5: Solve for x
    x = 103,674,917.09/13,454.13
  6. Step 6: Final answer
    x = 7,705.81

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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.