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Finding the Fourth Proportional to 30,755.49, 42,444.15 and 18,815.10

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Solution

The fourth proportional to 30,755.49, 42,444.15 and 18,815.10 is: 25,965.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,755.49 : 42,444.15 = 18,815.10 : x
  2. Step 2: Convert to fraction form
    30,755.49/42,444.15 = 18,815.10/x
  3. Step 3: Cross multiply
    30,755.49x = 42,444.15 × 18,815.10
  4. Step 4: Simplify right side
    30,755.49x = 798,590,926.67
  5. Step 5: Solve for x
    x = 798,590,926.67/30,755.49
  6. Step 6: Final answer
    x = 25,965.80

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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.