Home / 30,942.95-42,699.39-18,198.39

Finding the Fourth Proportional to 30,942.95, 42,699.39 and 18,198.39

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Solution

The fourth proportional to 30,942.95, 42,699.39 and 18,198.39 is: 25,112.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,942.95 : 42,699.39 = 18,198.39 : x
  2. Step 2: Convert to fraction form
    30,942.95/42,699.39 = 18,198.39/x
  3. Step 3: Cross multiply
    30,942.95x = 42,699.39 × 18,198.39
  4. Step 4: Simplify right side
    30,942.95x = 777,060,151.98
  5. Step 5: Solve for x
    x = 777,060,151.98/30,942.95
  6. Step 6: Final answer
    x = 25,112.68

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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.