Home / 13,144.55-18,139.22-7,479.17

Finding the Fourth Proportional to 13,144.55, 18,139.22 and 7,479.17

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Solution

The fourth proportional to 13,144.55, 18,139.22 and 7,479.17 is: 10,321.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.55 : 18,139.22 = 7,479.17 : x
  2. Step 2: Convert to fraction form
    13,144.55/18,139.22 = 7,479.17/x
  3. Step 3: Cross multiply
    13,144.55x = 18,139.22 × 7,479.17
  4. Step 4: Simplify right side
    13,144.55x = 135,666,238.05
  5. Step 5: Solve for x
    x = 135,666,238.05/13,144.55
  6. Step 6: Final answer
    x = 10,321.11

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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.