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Finding the Fourth Proportional to 30,755.48, 42,444.14 and 18,815.08

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Solution

The fourth proportional to 30,755.48, 42,444.14 and 18,815.08 is: 25,965.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,755.48 : 42,444.14 = 18,815.08 : x
  2. Step 2: Convert to fraction form
    30,755.48/42,444.14 = 18,815.08/x
  3. Step 3: Cross multiply
    30,755.48x = 42,444.14 × 18,815.08
  4. Step 4: Simplify right side
    30,755.48x = 798,589,889.63
  5. Step 5: Solve for x
    x = 798,589,889.63/30,755.48
  6. Step 6: Final answer
    x = 25,965.78

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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.