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Finding the Fourth Proportional to 8,977.79, 12,390.02 and 5,201.98

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Solution

The fourth proportional to 8,977.79, 12,390.02 and 5,201.98 is: 7,179.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,977.79 : 12,390.02 = 5,201.98 : x
  2. Step 2: Convert to fraction form
    8,977.79/12,390.02 = 5,201.98/x
  3. Step 3: Cross multiply
    8,977.79x = 12,390.02 × 5,201.98
  4. Step 4: Simplify right side
    8,977.79x = 64,452,636.24
  5. Step 5: Solve for x
    x = 64,452,636.24/8,977.79
  6. Step 6: Final answer
    x = 7,179.12

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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.