Home / 8,906.18-12,290.30-5,129.26

Finding the Fourth Proportional to 8,906.18, 12,290.30 and 5,129.26

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Solution

The fourth proportional to 8,906.18, 12,290.30 and 5,129.26 is: 7,078.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,906.18 : 12,290.30 = 5,129.26 : x
  2. Step 2: Convert to fraction form
    8,906.18/12,290.30 = 5,129.26/x
  3. Step 3: Cross multiply
    8,906.18x = 12,290.30 × 5,129.26
  4. Step 4: Simplify right side
    8,906.18x = 63,040,087.81
  5. Step 5: Solve for x
    x = 63,040,087.81/8,906.18
  6. Step 6: Final answer
    x = 7,078.24

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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.