Home / 20,363.40-30,512.30-12,555.81

Finding the Fourth Proportional to 20,363.40, 30,512.30 and 12,555.81

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Solution

The fourth proportional to 20,363.40, 30,512.30 and 12,555.81 is: 18,813.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,363.40 : 30,512.30 = 12,555.81 : x
  2. Step 2: Convert to fraction form
    20,363.40/30,512.30 = 12,555.81/x
  3. Step 3: Cross multiply
    20,363.40x = 30,512.30 × 12,555.81
  4. Step 4: Simplify right side
    20,363.40x = 383,106,578.68
  5. Step 5: Solve for x
    x = 383,106,578.68/20,363.40
  6. Step 6: Final answer
    x = 18,813.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.