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Finding the Fourth Proportional to 12,910.28, 19,374.04 and 4,702.28

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Solution

The fourth proportional to 12,910.28, 19,374.04 and 4,702.28 is: 7,056.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,910.28 : 19,374.04 = 4,702.28 : x
  2. Step 2: Convert to fraction form
    12,910.28/19,374.04 = 4,702.28/x
  3. Step 3: Cross multiply
    12,910.28x = 19,374.04 × 4,702.28
  4. Step 4: Simplify right side
    12,910.28x = 91,102,160.81
  5. Step 5: Solve for x
    x = 91,102,160.81/12,910.28
  6. Step 6: Final answer
    x = 7,056.56

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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.