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Finding the Fourth Proportional to 8,656.38, 12,986.19 and 4,271.58

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Solution

The fourth proportional to 8,656.38, 12,986.19 and 4,271.58 is: 6,408.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.38 : 12,986.19 = 4,271.58 : x
  2. Step 2: Convert to fraction form
    8,656.38/12,986.19 = 4,271.58/x
  3. Step 3: Cross multiply
    8,656.38x = 12,986.19 × 4,271.58
  4. Step 4: Simplify right side
    8,656.38x = 55,471,549.48
  5. Step 5: Solve for x
    x = 55,471,549.48/8,656.38
  6. Step 6: Final answer
    x = 6,408.17

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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.