Home / 8,688.35-11,989.32-4,911.70

Finding the Fourth Proportional to 8,688.35, 11,989.32 and 4,911.70

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Solution

The fourth proportional to 8,688.35, 11,989.32 and 4,911.70 is: 6,777.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.35 : 11,989.32 = 4,911.70 : x
  2. Step 2: Convert to fraction form
    8,688.35/11,989.32 = 4,911.70/x
  3. Step 3: Cross multiply
    8,688.35x = 11,989.32 × 4,911.70
  4. Step 4: Simplify right side
    8,688.35x = 58,887,943.04
  5. Step 5: Solve for x
    x = 58,887,943.04/8,688.35
  6. Step 6: Final answer
    x = 6,777.81

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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.