Home / 8,971.36-12,389.66-6,729.68

Finding the Fourth Proportional to 8,971.36, 12,389.66 and 6,729.68

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Solution

The fourth proportional to 8,971.36, 12,389.66 and 6,729.68 is: 9,293.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,971.36 : 12,389.66 = 6,729.68 : x
  2. Step 2: Convert to fraction form
    8,971.36/12,389.66 = 6,729.68/x
  3. Step 3: Cross multiply
    8,971.36x = 12,389.66 × 6,729.68
  4. Step 4: Simplify right side
    8,971.36x = 83,378,469.67
  5. Step 5: Solve for x
    x = 83,378,469.67/8,971.36
  6. Step 6: Final answer
    x = 9,293.85

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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.