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Finding the Fourth Proportional to 8,603.61, 12,901.46 and 3,405.93

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Solution

The fourth proportional to 8,603.61, 12,901.46 and 3,405.93 is: 5,107.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603.61 : 12,901.46 = 3,405.93 : x
  2. Step 2: Convert to fraction form
    8,603.61/12,901.46 = 3,405.93/x
  3. Step 3: Cross multiply
    8,603.61x = 12,901.46 × 3,405.93
  4. Step 4: Simplify right side
    8,603.61x = 43,941,452.63
  5. Step 5: Solve for x
    x = 43,941,452.63/8,603.61
  6. Step 6: Final answer
    x = 5,107.33

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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.