Home / 8,688.09-11,989.17-4,911.60

Finding the Fourth Proportional to 8,688.09, 11,989.17 and 4,911.60

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Solution

The fourth proportional to 8,688.09, 11,989.17 and 4,911.60 is: 6,777.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.09 : 11,989.17 = 4,911.60 : x
  2. Step 2: Convert to fraction form
    8,688.09/11,989.17 = 4,911.60/x
  3. Step 3: Cross multiply
    8,688.09x = 11,989.17 × 4,911.60
  4. Step 4: Simplify right side
    8,688.09x = 58,886,007.37
  5. Step 5: Solve for x
    x = 58,886,007.37/8,688.09
  6. Step 6: Final answer
    x = 6,777.79

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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.