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Finding the Fourth Proportional to 12,393, 18,587.61 and 4,995.54

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Solution

The fourth proportional to 12,393, 18,587.61 and 4,995.54 is: 7,492.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,393 : 18,587.61 = 4,995.54 : x
  2. Step 2: Convert to fraction form
    12,393/18,587.61 = 4,995.54/x
  3. Step 3: Cross multiply
    12,393x = 18,587.61 × 4,995.54
  4. Step 4: Simplify right side
    12,393x = 92,855,149.26
  5. Step 5: Solve for x
    x = 92,855,149.26/12,393
  6. Step 6: Final answer
    x = 7,492.55

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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.