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Finding the Fourth Proportional to 13,479.40, 20,225.37 and 5,156.67

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Solution

The fourth proportional to 13,479.40, 20,225.37 and 5,156.67 is: 7,737.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.40 : 20,225.37 = 5,156.67 : x
  2. Step 2: Convert to fraction form
    13,479.40/20,225.37 = 5,156.67/x
  3. Step 3: Cross multiply
    13,479.40x = 20,225.37 × 5,156.67
  4. Step 4: Simplify right side
    13,479.40x = 104,295,653.90
  5. Step 5: Solve for x
    x = 104,295,653.90/13,479.40
  6. Step 6: Final answer
    x = 7,737.41

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