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Finding the Fourth Proportional to 27,905.64, 41,858.48 and 7,129.16

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Solution

The fourth proportional to 27,905.64, 41,858.48 and 7,129.16 is: 10,693.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,905.64 : 41,858.48 = 7,129.16 : x
  2. Step 2: Convert to fraction form
    27,905.64/41,858.48 = 7,129.16/x
  3. Step 3: Cross multiply
    27,905.64x = 41,858.48 × 7,129.16
  4. Step 4: Simplify right side
    27,905.64x = 298,415,801.28
  5. Step 5: Solve for x
    x = 298,415,801.28/27,905.64
  6. Step 6: Final answer
    x = 10,693.75

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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.