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Finding the Fourth Proportional to 30,981.84, 42,755.04 and 17,555.58

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Solution

The fourth proportional to 30,981.84, 42,755.04 and 17,555.58 is: 24,226.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,981.84 : 42,755.04 = 17,555.58 : x
  2. Step 2: Convert to fraction form
    30,981.84/42,755.04 = 17,555.58/x
  3. Step 3: Cross multiply
    30,981.84x = 42,755.04 × 17,555.58
  4. Step 4: Simplify right side
    30,981.84x = 750,589,525.12
  5. Step 5: Solve for x
    x = 750,589,525.12/30,981.84
  6. Step 6: Final answer
    x = 24,226.76

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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.