Home / 11,435.50-15,780.84-6,399.64

Finding the Fourth Proportional to 11,435.50, 15,780.84 and 6,399.64

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Solution

The fourth proportional to 11,435.50, 15,780.84 and 6,399.64 is: 8,831.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,435.50 : 15,780.84 = 6,399.64 : x
  2. Step 2: Convert to fraction form
    11,435.50/15,780.84 = 6,399.64/x
  3. Step 3: Cross multiply
    11,435.50x = 15,780.84 × 6,399.64
  4. Step 4: Simplify right side
    11,435.50x = 100,991,694.90
  5. Step 5: Solve for x
    x = 100,991,694.90/11,435.50
  6. Step 6: Final answer
    x = 8,831.42

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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.