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Finding the Fourth Proportional to 8,485.44, 11,721.12 and 7,073.74

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Solution

The fourth proportional to 8,485.44, 11,721.12 and 7,073.74 is: 9,771.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.44 : 11,721.12 = 7,073.74 : x
  2. Step 2: Convert to fraction form
    8,485.44/11,721.12 = 7,073.74/x
  3. Step 3: Cross multiply
    8,485.44x = 11,721.12 × 7,073.74
  4. Step 4: Simplify right side
    8,485.44x = 82,912,155.39
  5. Step 5: Solve for x
    x = 82,912,155.39/8,485.44
  6. Step 6: Final answer
    x = 9,771.11

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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.