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Finding the Fourth Proportional to 28,539.52, 42,804.42 and 7,763.02

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Solution

The fourth proportional to 28,539.52, 42,804.42 and 7,763.02 is: 11,643.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,539.52 : 42,804.42 = 7,763.02 : x
  2. Step 2: Convert to fraction form
    28,539.52/42,804.42 = 7,763.02/x
  3. Step 3: Cross multiply
    28,539.52x = 42,804.42 × 7,763.02
  4. Step 4: Simplify right side
    28,539.52x = 332,291,568.55
  5. Step 5: Solve for x
    x = 332,291,568.55/28,539.52
  6. Step 6: Final answer
    x = 11,643.21

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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.