Home / 8,688.72-11,990.76-6,299.88

Finding the Fourth Proportional to 8,688.72, 11,990.76 and 6,299.88

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Solution

The fourth proportional to 8,688.72, 11,990.76 and 6,299.88 is: 8,694.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.72 : 11,990.76 = 6,299.88 : x
  2. Step 2: Convert to fraction form
    8,688.72/11,990.76 = 6,299.88/x
  3. Step 3: Cross multiply
    8,688.72x = 11,990.76 × 6,299.88
  4. Step 4: Simplify right side
    8,688.72x = 75,540,349.11
  5. Step 5: Solve for x
    x = 75,540,349.11/8,688.72
  6. Step 6: Final answer
    x = 8,694.07

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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.