Home / 8,280.72-11,428.20-6,181.20

Finding the Fourth Proportional to 8,280.72, 11,428.20 and 6,181.20

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Solution

The fourth proportional to 8,280.72, 11,428.20 and 6,181.20 is: 8,530.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,280.72 : 11,428.20 = 6,181.20 : x
  2. Step 2: Convert to fraction form
    8,280.72/11,428.20 = 6,181.20/x
  3. Step 3: Cross multiply
    8,280.72x = 11,428.20 × 6,181.20
  4. Step 4: Simplify right side
    8,280.72x = 70,639,989.84
  5. Step 5: Solve for x
    x = 70,639,989.84/8,280.72
  6. Step 6: Final answer
    x = 8,530.66

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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.