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Finding the Fourth Proportional to 8,968.86, 13,457.21 and 3,422.79

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Solution

The fourth proportional to 8,968.86, 13,457.21 and 3,422.79 is: 5,135.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,968.86 : 13,457.21 = 3,422.79 : x
  2. Step 2: Convert to fraction form
    8,968.86/13,457.21 = 3,422.79/x
  3. Step 3: Cross multiply
    8,968.86x = 13,457.21 × 3,422.79
  4. Step 4: Simplify right side
    8,968.86x = 46,061,186.70
  5. Step 5: Solve for x
    x = 46,061,186.70/8,968.86
  6. Step 6: Final answer
    x = 5,135.68

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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.