Home / 11,112.80-15,337.55-6,399.81

Finding the Fourth Proportional to 11,112.80, 15,337.55 and 6,399.81

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Solution

The fourth proportional to 11,112.80, 15,337.55 and 6,399.81 is: 8,832.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,112.80 : 15,337.55 = 6,399.81 : x
  2. Step 2: Convert to fraction form
    11,112.80/15,337.55 = 6,399.81/x
  3. Step 3: Cross multiply
    11,112.80x = 15,337.55 × 6,399.81
  4. Step 4: Simplify right side
    11,112.80x = 98,157,421.87
  5. Step 5: Solve for x
    x = 98,157,421.87/11,112.80
  6. Step 6: Final answer
    x = 8,832.83

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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.