Home / 13,431.29-20,159.25-7,198.34

Finding the Fourth Proportional to 13,431.29, 20,159.25 and 7,198.34

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Solution

The fourth proportional to 13,431.29, 20,159.25 and 7,198.34 is: 10,804.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.29 : 20,159.25 = 7,198.34 : x
  2. Step 2: Convert to fraction form
    13,431.29/20,159.25 = 7,198.34/x
  3. Step 3: Cross multiply
    13,431.29x = 20,159.25 × 7,198.34
  4. Step 4: Simplify right side
    13,431.29x = 145,113,007.85
  5. Step 5: Solve for x
    x = 145,113,007.85/13,431.29
  6. Step 6: Final answer
    x = 10,804.10

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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.