Home / 12,116.54-16,720.75-6,811.31

Finding the Fourth Proportional to 12,116.54, 16,720.75 and 6,811.31

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Solution

The fourth proportional to 12,116.54, 16,720.75 and 6,811.31 is: 9,399.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,116.54 : 16,720.75 = 6,811.31 : x
  2. Step 2: Convert to fraction form
    12,116.54/16,720.75 = 6,811.31/x
  3. Step 3: Cross multiply
    12,116.54x = 16,720.75 × 6,811.31
  4. Step 4: Simplify right side
    12,116.54x = 113,890,211.68
  5. Step 5: Solve for x
    x = 113,890,211.68/12,116.54
  6. Step 6: Final answer
    x = 9,399.57

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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.