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Finding the Fourth Proportional to 8,720.47, 11,873.25 and 8,692.79

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Solution

The fourth proportional to 8,720.47, 11,873.25 and 8,692.79 is: 11,835.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.47 : 11,873.25 = 8,692.79 : x
  2. Step 2: Convert to fraction form
    8,720.47/11,873.25 = 8,692.79/x
  3. Step 3: Cross multiply
    8,720.47x = 11,873.25 × 8,692.79
  4. Step 4: Simplify right side
    8,720.47x = 103,211,625.40
  5. Step 5: Solve for x
    x = 103,211,625.40/8,720.47
  6. Step 6: Final answer
    x = 11,835.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.