Home / 11,278.92-16,905.86-5,720.78

Finding the Fourth Proportional to 11,278.92, 16,905.86 and 5,720.78

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Solution

The fourth proportional to 11,278.92, 16,905.86 and 5,720.78 is: 8,574.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,278.92 : 16,905.86 = 5,720.78 : x
  2. Step 2: Convert to fraction form
    11,278.92/16,905.86 = 5,720.78/x
  3. Step 3: Cross multiply
    11,278.92x = 16,905.86 × 5,720.78
  4. Step 4: Simplify right side
    11,278.92x = 96,714,740.88
  5. Step 5: Solve for x
    x = 96,714,740.88/11,278.92
  6. Step 6: Final answer
    x = 8,574.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.