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Finding the Fourth Proportional to 8,710.20, 12,018.98 and 7,212.11

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Solution

The fourth proportional to 8,710.20, 12,018.98 and 7,212.11 is: 9,951.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,710.20 : 12,018.98 = 7,212.11 : x
  2. Step 2: Convert to fraction form
    8,710.20/12,018.98 = 7,212.11/x
  3. Step 3: Cross multiply
    8,710.20x = 12,018.98 × 7,212.11
  4. Step 4: Simplify right side
    8,710.20x = 86,682,163.78
  5. Step 5: Solve for x
    x = 86,682,163.78/8,710.20
  6. Step 6: Final answer
    x = 9,951.80

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1.5x scale

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.