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Finding the Fourth Proportional to 8,745.60, 12,062.88 and 5,205.90

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Solution

The fourth proportional to 8,745.60, 12,062.88 and 5,205.90 is: 7,180.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,745.60 : 12,062.88 = 5,205.90 : x
  2. Step 2: Convert to fraction form
    8,745.60/12,062.88 = 5,205.90/x
  3. Step 3: Cross multiply
    8,745.60x = 12,062.88 × 5,205.90
  4. Step 4: Simplify right side
    8,745.60x = 62,798,146.99
  5. Step 5: Solve for x
    x = 62,798,146.99/8,745.60
  6. Step 6: Final answer
    x = 7,180.54

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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.