Home / 12,520.84-18,778.18-4,200.67

Finding the Fourth Proportional to 12,520.84, 18,778.18 and 4,200.67

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Solution

The fourth proportional to 12,520.84, 18,778.18 and 4,200.67 is: 6,299.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,520.84 : 18,778.18 = 4,200.67 : x
  2. Step 2: Convert to fraction form
    12,520.84/18,778.18 = 4,200.67/x
  3. Step 3: Cross multiply
    12,520.84x = 18,778.18 × 4,200.67
  4. Step 4: Simplify right side
    12,520.84x = 78,880,822.49
  5. Step 5: Solve for x
    x = 78,880,822.49/12,520.84
  6. Step 6: Final answer
    x = 6,299.97

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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.