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Finding the Fourth Proportional to 18,953.29, 28,431.29 and 5,803.95

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Solution

The fourth proportional to 18,953.29, 28,431.29 and 5,803.95 is: 8,706.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.29 : 28,431.29 = 5,803.95 : x
  2. Step 2: Convert to fraction form
    18,953.29/28,431.29 = 5,803.95/x
  3. Step 3: Cross multiply
    18,953.29x = 28,431.29 × 5,803.95
  4. Step 4: Simplify right side
    18,953.29x = 165,013,785.60
  5. Step 5: Solve for x
    x = 165,013,785.60/18,953.29
  6. Step 6: Final answer
    x = 8,706.34

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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.