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Finding the Fourth Proportional to 11,139, 15,365.94 and 6,944.28

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Solution

The fourth proportional to 11,139, 15,365.94 and 6,944.28 is: 9,579.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139 : 15,365.94 = 6,944.28 : x
  2. Step 2: Convert to fraction form
    11,139/15,365.94 = 6,944.28/x
  3. Step 3: Cross multiply
    11,139x = 15,365.94 × 6,944.28
  4. Step 4: Simplify right side
    11,139x = 106,705,389.82
  5. Step 5: Solve for x
    x = 106,705,389.82/11,139
  6. Step 6: Final answer
    x = 9,579.44

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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.