Home / 13,144.13-18,139.31-7,479.70

Finding the Fourth Proportional to 13,144.13, 18,139.31 and 7,479.70

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Solution

The fourth proportional to 13,144.13, 18,139.31 and 7,479.70 is: 10,322.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.13 : 18,139.31 = 7,479.70 : x
  2. Step 2: Convert to fraction form
    13,144.13/18,139.31 = 7,479.70/x
  3. Step 3: Cross multiply
    13,144.13x = 18,139.31 × 7,479.70
  4. Step 4: Simplify right side
    13,144.13x = 135,676,597.01
  5. Step 5: Solve for x
    x = 135,676,597.01/13,144.13
  6. Step 6: Final answer
    x = 10,322.22

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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.