Home / 12,420.18-18,631.94-4,521.67

Finding the Fourth Proportional to 12,420.18, 18,631.94 and 4,521.67

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Solution

The fourth proportional to 12,420.18, 18,631.94 and 4,521.67 is: 6,783.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.18 : 18,631.94 = 4,521.67 : x
  2. Step 2: Convert to fraction form
    12,420.18/18,631.94 = 4,521.67/x
  3. Step 3: Cross multiply
    12,420.18x = 18,631.94 × 4,521.67
  4. Step 4: Simplify right side
    12,420.18x = 84,247,414.95
  5. Step 5: Solve for x
    x = 84,247,414.95/12,420.18
  6. Step 6: Final answer
    x = 6,783.11

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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.