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Finding the Fourth Proportional to 35,302.80, 52,921.26 and 11,912.88

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Solution

The fourth proportional to 35,302.80, 52,921.26 and 11,912.88 is: 17,858.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,302.80 : 52,921.26 = 11,912.88 : x
  2. Step 2: Convert to fraction form
    35,302.80/52,921.26 = 11,912.88/x
  3. Step 3: Cross multiply
    35,302.80x = 52,921.26 × 11,912.88
  4. Step 4: Simplify right side
    35,302.80x = 630,444,619.83
  5. Step 5: Solve for x
    x = 630,444,619.83/35,302.80
  6. Step 6: Final answer
    x = 17,858.20

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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.