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Finding the Fourth Proportional to 12,911.28, 19,375.54 and 4,703.28

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Solution

The fourth proportional to 12,911.28, 19,375.54 and 4,703.28 is: 7,058.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.28 : 19,375.54 = 4,703.28 : x
  2. Step 2: Convert to fraction form
    12,911.28/19,375.54 = 4,703.28/x
  3. Step 3: Cross multiply
    12,911.28x = 19,375.54 × 4,703.28
  4. Step 4: Simplify right side
    12,911.28x = 91,128,589.77
  5. Step 5: Solve for x
    x = 91,128,589.77/12,911.28
  6. Step 6: Final answer
    x = 7,058.06

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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.