Home / 11,715.72-16,166.10-6,999

Finding the Fourth Proportional to 11,715.72, 16,166.10 and 6,999

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Solution

The fourth proportional to 11,715.72, 16,166.10 and 6,999 is: 9,657.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,715.72 : 16,166.10 = 6,999 : x
  2. Step 2: Convert to fraction form
    11,715.72/16,166.10 = 6,999/x
  3. Step 3: Cross multiply
    11,715.72x = 16,166.10 × 6,999
  4. Step 4: Simplify right side
    11,715.72x = 113,146,533.90
  5. Step 5: Solve for x
    x = 113,146,533.90/11,715.72
  6. Step 6: Final answer
    x = 9,657.67

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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.