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Finding the Fourth Proportional to 18,735.92, 28,109.51 and 5,588.28

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Solution

The fourth proportional to 18,735.92, 28,109.51 and 5,588.28 is: 8,384.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,735.92 : 28,109.51 = 5,588.28 : x
  2. Step 2: Convert to fraction form
    18,735.92/28,109.51 = 5,588.28/x
  3. Step 3: Cross multiply
    18,735.92x = 28,109.51 × 5,588.28
  4. Step 4: Simplify right side
    18,735.92x = 157,083,812.54
  5. Step 5: Solve for x
    x = 157,083,812.54/18,735.92
  6. Step 6: Final answer
    x = 8,384.10

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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.