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Finding the Fourth Proportional to 12,671.70, 19,009.35 and 3,905.70

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Solution

The fourth proportional to 12,671.70, 19,009.35 and 3,905.70 is: 5,859.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671.70 : 19,009.35 = 3,905.70 : x
  2. Step 2: Convert to fraction form
    12,671.70/19,009.35 = 3,905.70/x
  3. Step 3: Cross multiply
    12,671.70x = 19,009.35 × 3,905.70
  4. Step 4: Simplify right side
    12,671.70x = 74,244,818.30
  5. Step 5: Solve for x
    x = 74,244,818.30/12,671.70
  6. Step 6: Final answer
    x = 5,859.10

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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.