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Finding the Fourth Proportional to 13,856.94, 20,791.44 and 7,281.54

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Solution

The fourth proportional to 13,856.94, 20,791.44 and 7,281.54 is: 10,925.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,856.94 : 20,791.44 = 7,281.54 : x
  2. Step 2: Convert to fraction form
    13,856.94/20,791.44 = 7,281.54/x
  3. Step 3: Cross multiply
    13,856.94x = 20,791.44 × 7,281.54
  4. Step 4: Simplify right side
    13,856.94x = 151,393,702.02
  5. Step 5: Solve for x
    x = 151,393,702.02/13,856.94
  6. Step 6: Final answer
    x = 10,925.48

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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.