Home / 8,428.47-12,622.99-6,661.62

Finding the Fourth Proportional to 8,428.47, 12,622.99 and 6,661.62

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Solution

The fourth proportional to 8,428.47, 12,622.99 and 6,661.62 is: 9,976.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.47 : 12,622.99 = 6,661.62 : x
  2. Step 2: Convert to fraction form
    8,428.47/12,622.99 = 6,661.62/x
  3. Step 3: Cross multiply
    8,428.47x = 12,622.99 × 6,661.62
  4. Step 4: Simplify right side
    8,428.47x = 84,089,562.64
  5. Step 5: Solve for x
    x = 84,089,562.64/8,428.47
  6. Step 6: Final answer
    x = 9,976.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.