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Finding the Fourth Proportional to 28,496.40, 42,739.08 and 8,769.66

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Solution

The fourth proportional to 28,496.40, 42,739.08 and 8,769.66 is: 13,152.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,496.40 : 42,739.08 = 8,769.66 : x
  2. Step 2: Convert to fraction form
    28,496.40/42,739.08 = 8,769.66/x
  3. Step 3: Cross multiply
    28,496.40x = 42,739.08 × 8,769.66
  4. Step 4: Simplify right side
    28,496.40x = 374,807,200.31
  5. Step 5: Solve for x
    x = 374,807,200.31/28,496.40
  6. Step 6: Final answer
    x = 13,152.79

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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.