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Finding the Fourth Proportional to 8,771.58, 13,147.14 and 3,220.74

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Solution

The fourth proportional to 8,771.58, 13,147.14 and 3,220.74 is: 4,827.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,771.58 : 13,147.14 = 3,220.74 : x
  2. Step 2: Convert to fraction form
    8,771.58/13,147.14 = 3,220.74/x
  3. Step 3: Cross multiply
    8,771.58x = 13,147.14 × 3,220.74
  4. Step 4: Simplify right side
    8,771.58x = 42,343,519.68
  5. Step 5: Solve for x
    x = 42,343,519.68/8,771.58
  6. Step 6: Final answer
    x = 4,827.35

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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.