Home / 12,116.69-16,720.95-6,811.56

Finding the Fourth Proportional to 12,116.69, 16,720.95 and 6,811.56

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Solution

The fourth proportional to 12,116.69, 16,720.95 and 6,811.56 is: 9,399.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,116.69 : 16,720.95 = 6,811.56 : x
  2. Step 2: Convert to fraction form
    12,116.69/16,720.95 = 6,811.56/x
  3. Step 3: Cross multiply
    12,116.69x = 16,720.95 × 6,811.56
  4. Step 4: Simplify right side
    12,116.69x = 113,895,636.52
  5. Step 5: Solve for x
    x = 113,895,636.52/12,116.69
  6. Step 6: Final answer
    x = 9,399.90

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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.