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Finding the Fourth Proportional to 18,719.76, 28,058.04 and 7,025.52

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Solution

The fourth proportional to 18,719.76, 28,058.04 and 7,025.52 is: 10,530.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.76 : 28,058.04 = 7,025.52 : x
  2. Step 2: Convert to fraction form
    18,719.76/28,058.04 = 7,025.52/x
  3. Step 3: Cross multiply
    18,719.76x = 28,058.04 × 7,025.52
  4. Step 4: Simplify right side
    18,719.76x = 197,122,321.18
  5. Step 5: Solve for x
    x = 197,122,321.18/18,719.76
  6. Step 6: Final answer
    x = 10,530.17

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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.