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Finding the Fourth Proportional to 8,430.75, 12,647.75 and 3,236.22

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Solution

The fourth proportional to 8,430.75, 12,647.75 and 3,236.22 is: 4,854.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,430.75 : 12,647.75 = 3,236.22 : x
  2. Step 2: Convert to fraction form
    8,430.75/12,647.75 = 3,236.22/x
  3. Step 3: Cross multiply
    8,430.75x = 12,647.75 × 3,236.22
  4. Step 4: Simplify right side
    8,430.75x = 40,930,901.51
  5. Step 5: Solve for x
    x = 40,930,901.51/8,430.75
  6. Step 6: Final answer
    x = 4,854.95

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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.