Home / 13,144.32-18,139.53-7,479.87

Finding the Fourth Proportional to 13,144.32, 18,139.53 and 7,479.87

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Solution

The fourth proportional to 13,144.32, 18,139.53 and 7,479.87 is: 10,322.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.32 : 18,139.53 = 7,479.87 : x
  2. Step 2: Convert to fraction form
    13,144.32/18,139.53 = 7,479.87/x
  3. Step 3: Cross multiply
    13,144.32x = 18,139.53 × 7,479.87
  4. Step 4: Simplify right side
    13,144.32x = 135,681,326.26
  5. Step 5: Solve for x
    x = 135,681,326.26/13,144.32
  6. Step 6: Final answer
    x = 10,322.43

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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.