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Finding the Fourth Proportional to 8,605.36, 12,905.16 and 2,760.58

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Solution

The fourth proportional to 8,605.36, 12,905.16 and 2,760.58 is: 4,139.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.36 : 12,905.16 = 2,760.58 : x
  2. Step 2: Convert to fraction form
    8,605.36/12,905.16 = 2,760.58/x
  3. Step 3: Cross multiply
    8,605.36x = 12,905.16 × 2,760.58
  4. Step 4: Simplify right side
    8,605.36x = 35,625,726.59
  5. Step 5: Solve for x
    x = 35,625,726.59/8,605.36
  6. Step 6: Final answer
    x = 4,139.95

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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.