Home / 30,768.31-42,474.44-18,019.72

Finding the Fourth Proportional to 30,768.31, 42,474.44 and 18,019.72

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Solution

The fourth proportional to 30,768.31, 42,474.44 and 18,019.72 is: 24,875.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,768.31 : 42,474.44 = 18,019.72 : x
  2. Step 2: Convert to fraction form
    30,768.31/42,474.44 = 18,019.72/x
  3. Step 3: Cross multiply
    30,768.31x = 42,474.44 × 18,019.72
  4. Step 4: Simplify right side
    30,768.31x = 765,377,515.96
  5. Step 5: Solve for x
    x = 765,377,515.96/30,768.31
  6. Step 6: Final answer
    x = 24,875.51

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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.