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Finding the Fourth Proportional to 18,746.92, 28,109.73 and 7,640.60

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Solution

The fourth proportional to 18,746.92, 28,109.73 and 7,640.60 is: 11,456.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,746.92 : 28,109.73 = 7,640.60 : x
  2. Step 2: Convert to fraction form
    18,746.92/28,109.73 = 7,640.60/x
  3. Step 3: Cross multiply
    18,746.92x = 28,109.73 × 7,640.60
  4. Step 4: Simplify right side
    18,746.92x = 214,775,203.04
  5. Step 5: Solve for x
    x = 214,775,203.04/18,746.92
  6. Step 6: Final answer
    x = 11,456.56

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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.