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Finding the Fourth Proportional to 8,172.57, 11,332.67 and 7,895.55

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Solution

The fourth proportional to 8,172.57, 11,332.67 and 7,895.55 is: 10,948.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,172.57 : 11,332.67 = 7,895.55 : x
  2. Step 2: Convert to fraction form
    8,172.57/11,332.67 = 7,895.55/x
  3. Step 3: Cross multiply
    8,172.57x = 11,332.67 × 7,895.55
  4. Step 4: Simplify right side
    8,172.57x = 89,477,682.36
  5. Step 5: Solve for x
    x = 89,477,682.36/8,172.57
  6. Step 6: Final answer
    x = 10,948.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.