Home / 12,419.81-17,139.38-6,754.56

Finding the Fourth Proportional to 12,419.81, 17,139.38 and 6,754.56

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Solution

The fourth proportional to 12,419.81, 17,139.38 and 6,754.56 is: 9,321.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,419.81 : 17,139.38 = 6,754.56 : x
  2. Step 2: Convert to fraction form
    12,419.81/17,139.38 = 6,754.56/x
  3. Step 3: Cross multiply
    12,419.81x = 17,139.38 × 6,754.56
  4. Step 4: Simplify right side
    12,419.81x = 115,768,987.46
  5. Step 5: Solve for x
    x = 115,768,987.46/12,419.81
  6. Step 6: Final answer
    x = 9,321.32

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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.