Home / 13,319.28-18,380.64-7,351.08

Finding the Fourth Proportional to 13,319.28, 18,380.64 and 7,351.08

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Solution

The fourth proportional to 13,319.28, 18,380.64 and 7,351.08 is: 10,144.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.28 : 18,380.64 = 7,351.08 : x
  2. Step 2: Convert to fraction form
    13,319.28/18,380.64 = 7,351.08/x
  3. Step 3: Cross multiply
    13,319.28x = 18,380.64 × 7,351.08
  4. Step 4: Simplify right side
    13,319.28x = 135,117,555.09
  5. Step 5: Solve for x
    x = 135,117,555.09/13,319.28
  6. Step 6: Final answer
    x = 10,144.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.