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Finding the Fourth Proportional to 28,396.98, 42,595.47 and 7,621.02

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Solution

The fourth proportional to 28,396.98, 42,595.47 and 7,621.02 is: 11,431.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,396.98 : 42,595.47 = 7,621.02 : x
  2. Step 2: Convert to fraction form
    28,396.98/42,595.47 = 7,621.02/x
  3. Step 3: Cross multiply
    28,396.98x = 42,595.47 × 7,621.02
  4. Step 4: Simplify right side
    28,396.98x = 324,620,928.78
  5. Step 5: Solve for x
    x = 324,620,928.78/28,396.98
  6. Step 6: Final answer
    x = 11,431.53

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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.