Home / 12,116.50-16,720.68-6,811.36

Finding the Fourth Proportional to 12,116.50, 16,720.68 and 6,811.36

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Solution

The fourth proportional to 12,116.50, 16,720.68 and 6,811.36 is: 9,399.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,116.50 : 16,720.68 = 6,811.36 : x
  2. Step 2: Convert to fraction form
    12,116.50/16,720.68 = 6,811.36/x
  3. Step 3: Cross multiply
    12,116.50x = 16,720.68 × 6,811.36
  4. Step 4: Simplify right side
    12,116.50x = 113,890,570.92
  5. Step 5: Solve for x
    x = 113,890,570.92/12,116.50
  6. Step 6: Final answer
    x = 9,399.63

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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.