Home / 12,220.75-18,312.90-7,834.60

Finding the Fourth Proportional to 12,220.75, 18,312.90 and 7,834.60

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Solution

The fourth proportional to 12,220.75, 18,312.90 and 7,834.60 is: 11,740.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.75 : 18,312.90 = 7,834.60 : x
  2. Step 2: Convert to fraction form
    12,220.75/18,312.90 = 7,834.60/x
  3. Step 3: Cross multiply
    12,220.75x = 18,312.90 × 7,834.60
  4. Step 4: Simplify right side
    12,220.75x = 143,474,246.34
  5. Step 5: Solve for x
    x = 143,474,246.34/12,220.75
  6. Step 6: Final answer
    x = 11,740.22

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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.