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Finding the Fourth Proportional to 8,940.30, 12,339.53 and 5,164.08

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Solution

The fourth proportional to 8,940.30, 12,339.53 and 5,164.08 is: 7,127.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,940.30 : 12,339.53 = 5,164.08 : x
  2. Step 2: Convert to fraction form
    8,940.30/12,339.53 = 5,164.08/x
  3. Step 3: Cross multiply
    8,940.30x = 12,339.53 × 5,164.08
  4. Step 4: Simplify right side
    8,940.30x = 63,722,320.08
  5. Step 5: Solve for x
    x = 63,722,320.08/8,940.30
  6. Step 6: Final answer
    x = 7,127.54

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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.