Home / 30,936.71-42,690.30-18,190.41

Finding the Fourth Proportional to 30,936.71, 42,690.30 and 18,190.41

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Solution

The fourth proportional to 30,936.71, 42,690.30 and 18,190.41 is: 25,101.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,936.71 : 42,690.30 = 18,190.41 : x
  2. Step 2: Convert to fraction form
    30,936.71/42,690.30 = 18,190.41/x
  3. Step 3: Cross multiply
    30,936.71x = 42,690.30 × 18,190.41
  4. Step 4: Simplify right side
    30,936.71x = 776,554,060.02
  5. Step 5: Solve for x
    x = 776,554,060.02/30,936.71
  6. Step 6: Final answer
    x = 25,101.38

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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.