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Finding the Fourth Proportional to 8,686.84, 13,027.50 and 3,139.45

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Solution

The fourth proportional to 8,686.84, 13,027.50 and 3,139.45 is: 4,708.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.84 : 13,027.50 = 3,139.45 : x
  2. Step 2: Convert to fraction form
    8,686.84/13,027.50 = 3,139.45/x
  3. Step 3: Cross multiply
    8,686.84x = 13,027.50 × 3,139.45
  4. Step 4: Simplify right side
    8,686.84x = 40,899,184.88
  5. Step 5: Solve for x
    x = 40,899,184.88/8,686.84
  6. Step 6: Final answer
    x = 4,708.18

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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.