Home / 12,578.19-17,357.91-6,989.19

Finding the Fourth Proportional to 12,578.19, 17,357.91 and 6,989.19

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Solution

The fourth proportional to 12,578.19, 17,357.91 and 6,989.19 is: 9,645.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.19 : 17,357.91 = 6,989.19 : x
  2. Step 2: Convert to fraction form
    12,578.19/17,357.91 = 6,989.19/x
  3. Step 3: Cross multiply
    12,578.19x = 17,357.91 × 6,989.19
  4. Step 4: Simplify right side
    12,578.19x = 121,317,696.05
  5. Step 5: Solve for x
    x = 121,317,696.05/12,578.19
  6. Step 6: Final answer
    x = 9,645.08

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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.