Home / 8,640.80-11,921.32-4,863.36

Finding the Fourth Proportional to 8,640.80, 11,921.32 and 4,863.36

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Solution

The fourth proportional to 8,640.80, 11,921.32 and 4,863.36 is: 6,709.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.80 : 11,921.32 = 4,863.36 : x
  2. Step 2: Convert to fraction form
    8,640.80/11,921.32 = 4,863.36/x
  3. Step 3: Cross multiply
    8,640.80x = 11,921.32 × 4,863.36
  4. Step 4: Simplify right side
    8,640.80x = 57,977,670.84
  5. Step 5: Solve for x
    x = 57,977,670.84/8,640.80
  6. Step 6: Final answer
    x = 6,709.76

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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.