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Finding the Fourth Proportional to 28,365.80, 42,548.09 and 7,589.30

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Solution

The fourth proportional to 28,365.80, 42,548.09 and 7,589.30 is: 11,383.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,365.80 : 42,548.09 = 7,589.30 : x
  2. Step 2: Convert to fraction form
    28,365.80/42,548.09 = 7,589.30/x
  3. Step 3: Cross multiply
    28,365.80x = 42,548.09 × 7,589.30
  4. Step 4: Simplify right side
    28,365.80x = 322,909,968.75
  5. Step 5: Solve for x
    x = 322,909,968.75/28,365.80
  6. Step 6: Final answer
    x = 11,383.78

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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.