Home / 12,421.74-17,139.07-8,396.06

Finding the Fourth Proportional to 12,421.74, 17,139.07 and 8,396.06

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Solution

The fourth proportional to 12,421.74, 17,139.07 and 8,396.06 is: 11,584.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.74 : 17,139.07 = 8,396.06 : x
  2. Step 2: Convert to fraction form
    12,421.74/17,139.07 = 8,396.06/x
  3. Step 3: Cross multiply
    12,421.74x = 17,139.07 × 8,396.06
  4. Step 4: Simplify right side
    12,421.74x = 143,900,660.06
  5. Step 5: Solve for x
    x = 143,900,660.06/12,421.74
  6. Step 6: Final answer
    x = 11,584.58

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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.