Home / 8,688.11-11,989.44-4,911.21

Finding the Fourth Proportional to 8,688.11, 11,989.44 and 4,911.21

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Solution

The fourth proportional to 8,688.11, 11,989.44 and 4,911.21 is: 6,777.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.11 : 11,989.44 = 4,911.21 : x
  2. Step 2: Convert to fraction form
    8,688.11/11,989.44 = 4,911.21/x
  3. Step 3: Cross multiply
    8,688.11x = 11,989.44 × 4,911.21
  4. Step 4: Simplify right side
    8,688.11x = 58,882,657.62
  5. Step 5: Solve for x
    x = 58,882,657.62/8,688.11
  6. Step 6: Final answer
    x = 6,777.39

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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.