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Finding the Fourth Proportional to 18,886.15, 28,328.01 and 5,738.64

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Solution

The fourth proportional to 18,886.15, 28,328.01 and 5,738.64 is: 8,607.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,886.15 : 28,328.01 = 5,738.64 : x
  2. Step 2: Convert to fraction form
    18,886.15/28,328.01 = 5,738.64/x
  3. Step 3: Cross multiply
    18,886.15x = 28,328.01 × 5,738.64
  4. Step 4: Simplify right side
    18,886.15x = 162,564,251.31
  5. Step 5: Solve for x
    x = 162,564,251.31/18,886.15
  6. Step 6: Final answer
    x = 8,607.59

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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.