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Finding the Fourth Proportional to 8,992.72, 12,405.54 and 6,009.28

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Solution

The fourth proportional to 8,992.72, 12,405.54 and 6,009.28 is: 8,289.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,992.72 : 12,405.54 = 6,009.28 : x
  2. Step 2: Convert to fraction form
    8,992.72/12,405.54 = 6,009.28/x
  3. Step 3: Cross multiply
    8,992.72x = 12,405.54 × 6,009.28
  4. Step 4: Simplify right side
    8,992.72x = 74,548,371.89
  5. Step 5: Solve for x
    x = 74,548,371.89/8,992.72
  6. Step 6: Final answer
    x = 8,289.86

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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.