Home / 30,777.82-42,463.94-18,828.70

Finding the Fourth Proportional to 30,777.82, 42,463.94 and 18,828.70

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Solution

The fourth proportional to 30,777.82, 42,463.94 and 18,828.70 is: 25,977.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,777.82 : 42,463.94 = 18,828.70 : x
  2. Step 2: Convert to fraction form
    30,777.82/42,463.94 = 18,828.70/x
  3. Step 3: Cross multiply
    30,777.82x = 42,463.94 × 18,828.70
  4. Step 4: Simplify right side
    30,777.82x = 799,540,787.08
  5. Step 5: Solve for x
    x = 799,540,787.08/30,777.82
  6. Step 6: Final answer
    x = 25,977.82

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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.