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Finding the Fourth Proportional to 19,172.76, 28,763.46 and 7,489.32

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Solution

The fourth proportional to 19,172.76, 28,763.46 and 7,489.32 is: 11,235.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,172.76 : 28,763.46 = 7,489.32 : x
  2. Step 2: Convert to fraction form
    19,172.76/28,763.46 = 7,489.32/x
  3. Step 3: Cross multiply
    19,172.76x = 28,763.46 × 7,489.32
  4. Step 4: Simplify right side
    19,172.76x = 215,418,756.25
  5. Step 5: Solve for x
    x = 215,418,756.25/19,172.76
  6. Step 6: Final answer
    x = 11,235.67

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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.