Home / 13,419.12-20,128.66-5,097.18

Finding the Fourth Proportional to 13,419.12, 20,128.66 and 5,097.18

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Solution

The fourth proportional to 13,419.12, 20,128.66 and 5,097.18 is: 7,645.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,419.12 : 20,128.66 = 5,097.18 : x
  2. Step 2: Convert to fraction form
    13,419.12/20,128.66 = 5,097.18/x
  3. Step 3: Cross multiply
    13,419.12x = 20,128.66 × 5,097.18
  4. Step 4: Simplify right side
    13,419.12x = 102,599,403.18
  5. Step 5: Solve for x
    x = 102,599,403.18/13,419.12
  6. Step 6: Final answer
    x = 7,645.76

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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.