Home / 8,939.05-12,339.95-6,111

Finding the Fourth Proportional to 8,939.05, 12,339.95 and 6,111

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Solution

The fourth proportional to 8,939.05, 12,339.95 and 6,111 is: 8,435.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.05 : 12,339.95 = 6,111 : x
  2. Step 2: Convert to fraction form
    8,939.05/12,339.95 = 6,111/x
  3. Step 3: Cross multiply
    8,939.05x = 12,339.95 × 6,111
  4. Step 4: Simplify right side
    8,939.05x = 75,409,403.90
  5. Step 5: Solve for x
    x = 75,409,403.90/8,939.05
  6. Step 6: Final answer
    x = 8,435.96

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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.