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Finding the Fourth Proportional to 20,450.60, 30,680 and 7,302.63

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Solution

The fourth proportional to 20,450.60, 30,680 and 7,302.63 is: 10,955.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,450.60 : 30,680 = 7,302.63 : x
  2. Step 2: Convert to fraction form
    20,450.60/30,680 = 7,302.63/x
  3. Step 3: Cross multiply
    20,450.60x = 30,680 × 7,302.63
  4. Step 4: Simplify right side
    20,450.60x = 224,044,688.40
  5. Step 5: Solve for x
    x = 224,044,688.40/20,450.60
  6. Step 6: Final answer
    x = 10,955.41

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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.