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Finding the Fourth Proportional to 8,640.63, 11,912.04 and 7,301.79

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Solution

The fourth proportional to 8,640.63, 11,912.04 and 7,301.79 is: 10,066.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.63 : 11,912.04 = 7,301.79 : x
  2. Step 2: Convert to fraction form
    8,640.63/11,912.04 = 7,301.79/x
  3. Step 3: Cross multiply
    8,640.63x = 11,912.04 × 7,301.79
  4. Step 4: Simplify right side
    8,640.63x = 86,979,214.55
  5. Step 5: Solve for x
    x = 86,979,214.55/8,640.63
  6. Step 6: Final answer
    x = 10,066.30

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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.