Home / 11,435.72-15,781.60-6,400.81

Finding the Fourth Proportional to 11,435.72, 15,781.60 and 6,400.81

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Solution

The fourth proportional to 11,435.72, 15,781.60 and 6,400.81 is: 8,833.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,435.72 : 15,781.60 = 6,400.81 : x
  2. Step 2: Convert to fraction form
    11,435.72/15,781.60 = 6,400.81/x
  3. Step 3: Cross multiply
    11,435.72x = 15,781.60 × 6,400.81
  4. Step 4: Simplify right side
    11,435.72x = 101,015,050.82
  5. Step 5: Solve for x
    x = 101,015,050.82/11,435.72
  6. Step 6: Final answer
    x = 8,833.29

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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.