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Finding the Fourth Proportional to 12,751.73, 19,129.87 and 4,429.28

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Solution

The fourth proportional to 12,751.73, 19,129.87 and 4,429.28 is: 6,644.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,751.73 : 19,129.87 = 4,429.28 : x
  2. Step 2: Convert to fraction form
    12,751.73/19,129.87 = 4,429.28/x
  3. Step 3: Cross multiply
    12,751.73x = 19,129.87 × 4,429.28
  4. Step 4: Simplify right side
    12,751.73x = 84,731,603.95
  5. Step 5: Solve for x
    x = 84,731,603.95/12,751.73
  6. Step 6: Final answer
    x = 6,644.72

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1.5x scale

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.