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Finding the Fourth Proportional to 9,866.45, 14,727.70 and 8,620.87

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Solution

The fourth proportional to 9,866.45, 14,727.70 and 8,620.87 is: 12,868.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,866.45 : 14,727.70 = 8,620.87 : x
  2. Step 2: Convert to fraction form
    9,866.45/14,727.70 = 8,620.87/x
  3. Step 3: Cross multiply
    9,866.45x = 14,727.70 × 8,620.87
  4. Step 4: Simplify right side
    9,866.45x = 126,965,624.03
  5. Step 5: Solve for x
    x = 126,965,624.03/9,866.45
  6. Step 6: Final answer
    x = 12,868.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.