Home / 8,639.44-11,920.48-5,100.76

Finding the Fourth Proportional to 8,639.44, 11,920.48 and 5,100.76

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Solution

The fourth proportional to 8,639.44, 11,920.48 and 5,100.76 is: 7,037.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.44 : 11,920.48 = 5,100.76 : x
  2. Step 2: Convert to fraction form
    8,639.44/11,920.48 = 5,100.76/x
  3. Step 3: Cross multiply
    8,639.44x = 11,920.48 × 5,100.76
  4. Step 4: Simplify right side
    8,639.44x = 60,803,507.56
  5. Step 5: Solve for x
    x = 60,803,507.56/8,639.44
  6. Step 6: Final answer
    x = 7,037.90

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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.