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Finding the Fourth Proportional to 8,558.07, 12,807.90 and 7,172.97

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Solution

The fourth proportional to 8,558.07, 12,807.90 and 7,172.97 is: 10,734.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,558.07 : 12,807.90 = 7,172.97 : x
  2. Step 2: Convert to fraction form
    8,558.07/12,807.90 = 7,172.97/x
  3. Step 3: Cross multiply
    8,558.07x = 12,807.90 × 7,172.97
  4. Step 4: Simplify right side
    8,558.07x = 91,870,682.46
  5. Step 5: Solve for x
    x = 91,870,682.46/8,558.07
  6. Step 6: Final answer
    x = 10,734.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.