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Finding the Fourth Proportional to 8,979, 12,392.10 and 5,253

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Solution

The fourth proportional to 8,979, 12,392.10 and 5,253 is: 7,249.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979 : 12,392.10 = 5,253 : x
  2. Step 2: Convert to fraction form
    8,979/12,392.10 = 5,253/x
  3. Step 3: Cross multiply
    8,979x = 12,392.10 × 5,253
  4. Step 4: Simplify right side
    8,979x = 65,095,701.30
  5. Step 5: Solve for x
    x = 65,095,701.30/8,979
  6. Step 6: Final answer
    x = 7,249.77

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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.