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Finding the Fourth Proportional to 8,739.72, 12,066.39 and 6,719.22

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Solution

The fourth proportional to 8,739.72, 12,066.39 and 6,719.22 is: 9,276.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.72 : 12,066.39 = 6,719.22 : x
  2. Step 2: Convert to fraction form
    8,739.72/12,066.39 = 6,719.22/x
  3. Step 3: Cross multiply
    8,739.72x = 12,066.39 × 6,719.22
  4. Step 4: Simplify right side
    8,739.72x = 81,076,729.02
  5. Step 5: Solve for x
    x = 81,076,729.02/8,739.72
  6. Step 6: Final answer
    x = 9,276.81

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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.