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Finding the Fourth Proportional to 8,977, 12,389.08 and 5,251

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Solution

The fourth proportional to 8,977, 12,389.08 and 5,251 is: 7,246.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,977 : 12,389.08 = 5,251 : x
  2. Step 2: Convert to fraction form
    8,977/12,389.08 = 5,251/x
  3. Step 3: Cross multiply
    8,977x = 12,389.08 × 5,251
  4. Step 4: Simplify right side
    8,977x = 65,055,059.08
  5. Step 5: Solve for x
    x = 65,055,059.08/8,977
  6. Step 6: Final answer
    x = 7,246.86

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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.