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Finding the Fourth Proportional to 7,892.64, 11,830.95 and 5,121.06

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Solution

The fourth proportional to 7,892.64, 11,830.95 and 5,121.06 is: 7,676.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,892.64 : 11,830.95 = 5,121.06 : x
  2. Step 2: Convert to fraction form
    7,892.64/11,830.95 = 5,121.06/x
  3. Step 3: Cross multiply
    7,892.64x = 11,830.95 × 5,121.06
  4. Step 4: Simplify right side
    7,892.64x = 60,587,004.81
  5. Step 5: Solve for x
    x = 60,587,004.81/7,892.64
  6. Step 6: Final answer
    x = 7,676.39

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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.