Home / 8,639.28-11,905.56-6,277.68

Finding the Fourth Proportional to 8,639.28, 11,905.56 and 6,277.68

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Solution

The fourth proportional to 8,639.28, 11,905.56 and 6,277.68 is: 8,651.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.28 : 11,905.56 = 6,277.68 : x
  2. Step 2: Convert to fraction form
    8,639.28/11,905.56 = 6,277.68/x
  3. Step 3: Cross multiply
    8,639.28x = 11,905.56 × 6,277.68
  4. Step 4: Simplify right side
    8,639.28x = 74,739,295.90
  5. Step 5: Solve for x
    x = 74,739,295.90/8,639.28
  6. Step 6: Final answer
    x = 8,651.10

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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.