Home / 30,440.34-41,994.45-18,345.78

Finding the Fourth Proportional to 30,440.34, 41,994.45 and 18,345.78

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Solution

The fourth proportional to 30,440.34, 41,994.45 and 18,345.78 is: 25,309.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,440.34 : 41,994.45 = 18,345.78 : x
  2. Step 2: Convert to fraction form
    30,440.34/41,994.45 = 18,345.78/x
  3. Step 3: Cross multiply
    30,440.34x = 41,994.45 × 18,345.78
  4. Step 4: Simplify right side
    30,440.34x = 770,420,940.92
  5. Step 5: Solve for x
    x = 770,420,940.92/30,440.34
  6. Step 6: Final answer
    x = 25,309.21

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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.