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Finding the Fourth Proportional to 7,078.56, 10,620 and 3,618.24

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Solution

The fourth proportional to 7,078.56, 10,620 and 3,618.24 is: 5,428.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,078.56 : 10,620 = 3,618.24 : x
  2. Step 2: Convert to fraction form
    7,078.56/10,620 = 3,618.24/x
  3. Step 3: Cross multiply
    7,078.56x = 10,620 × 3,618.24
  4. Step 4: Simplify right side
    7,078.56x = 38,425,708.80
  5. Step 5: Solve for x
    x = 38,425,708.80/7,078.56
  6. Step 6: Final answer
    x = 5,428.46

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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.