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Finding the Fourth Proportional to 13,626.78, 20,448.05 and 5,728.67

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Solution

The fourth proportional to 13,626.78, 20,448.05 and 5,728.67 is: 8,596.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,626.78 : 20,448.05 = 5,728.67 : x
  2. Step 2: Convert to fraction form
    13,626.78/20,448.05 = 5,728.67/x
  3. Step 3: Cross multiply
    13,626.78x = 20,448.05 × 5,728.67
  4. Step 4: Simplify right side
    13,626.78x = 117,139,999.71
  5. Step 5: Solve for x
    x = 117,139,999.71/13,626.78
  6. Step 6: Final answer
    x = 8,596.31

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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.