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Finding the Fourth Proportional to 8,718, 12,032.46 and 4,992

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Solution

The fourth proportional to 8,718, 12,032.46 and 4,992 is: 6,889.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718 : 12,032.46 = 4,992 : x
  2. Step 2: Convert to fraction form
    8,718/12,032.46 = 4,992/x
  3. Step 3: Cross multiply
    8,718x = 12,032.46 × 4,992
  4. Step 4: Simplify right side
    8,718x = 60,066,040.32
  5. Step 5: Solve for x
    x = 60,066,040.32/8,718
  6. Step 6: Final answer
    x = 6,889.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.