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Finding the Fourth Proportional to 8,940.74, 12,338.76 and 5,164.60

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Solution

The fourth proportional to 8,940.74, 12,338.76 and 5,164.60 is: 7,127.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,940.74 : 12,338.76 = 5,164.60 : x
  2. Step 2: Convert to fraction form
    8,940.74/12,338.76 = 5,164.60/x
  3. Step 3: Cross multiply
    8,940.74x = 12,338.76 × 5,164.60
  4. Step 4: Simplify right side
    8,940.74x = 63,724,759.90
  5. Step 5: Solve for x
    x = 63,724,759.90/8,940.74
  6. Step 6: Final answer
    x = 7,127.46

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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.