Home / 8,270.64-12,395.34-3,878.40

Finding the Fourth Proportional to 8,270.64, 12,395.34 and 3,878.40

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Solution

The fourth proportional to 8,270.64, 12,395.34 and 3,878.40 is: 5,812.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,270.64 : 12,395.34 = 3,878.40 : x
  2. Step 2: Convert to fraction form
    8,270.64/12,395.34 = 3,878.40/x
  3. Step 3: Cross multiply
    8,270.64x = 12,395.34 × 3,878.40
  4. Step 4: Simplify right side
    8,270.64x = 48,074,086.66
  5. Step 5: Solve for x
    x = 48,074,086.66/8,270.64
  6. Step 6: Final answer
    x = 5,812.62

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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.