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Finding the Fourth Proportional to 8,523.20, 12,723.94 and 7,210.64

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Solution

The fourth proportional to 8,523.20, 12,723.94 and 7,210.64 is: 10,764.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,523.20 : 12,723.94 = 7,210.64 : x
  2. Step 2: Convert to fraction form
    8,523.20/12,723.94 = 7,210.64/x
  3. Step 3: Cross multiply
    8,523.20x = 12,723.94 × 7,210.64
  4. Step 4: Simplify right side
    8,523.20x = 91,747,750.72
  5. Step 5: Solve for x
    x = 91,747,750.72/8,523.20
  6. Step 6: Final answer
    x = 10,764.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.