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Finding the Fourth Proportional to 18,696.92, 28,038.09 and 7,003.76

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Solution

The fourth proportional to 18,696.92, 28,038.09 and 7,003.76 is: 10,502.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.92 : 28,038.09 = 7,003.76 : x
  2. Step 2: Convert to fraction form
    18,696.92/28,038.09 = 7,003.76/x
  3. Step 3: Cross multiply
    18,696.92x = 28,038.09 × 7,003.76
  4. Step 4: Simplify right side
    18,696.92x = 196,372,053.22
  5. Step 5: Solve for x
    x = 196,372,053.22/18,696.92
  6. Step 6: Final answer
    x = 10,502.91

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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.