Home / 30,716.49-42,390.50-18,777.90

Finding the Fourth Proportional to 30,716.49, 42,390.50 and 18,777.90

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Solution

The fourth proportional to 30,716.49, 42,390.50 and 18,777.90 is: 25,914.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,716.49 : 42,390.50 = 18,777.90 : x
  2. Step 2: Convert to fraction form
    30,716.49/42,390.50 = 18,777.90/x
  3. Step 3: Cross multiply
    30,716.49x = 42,390.50 × 18,777.90
  4. Step 4: Simplify right side
    30,716.49x = 796,004,476.06
  5. Step 5: Solve for x
    x = 796,004,476.06/30,716.49
  6. Step 6: Final answer
    x = 25,914.56

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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.