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Finding the Fourth Proportional to 28,442.58, 42,672.06 and 8,724.03

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Solution

The fourth proportional to 28,442.58, 42,672.06 and 8,724.03 is: 13,088.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.58 : 42,672.06 = 8,724.03 : x
  2. Step 2: Convert to fraction form
    28,442.58/42,672.06 = 8,724.03/x
  3. Step 3: Cross multiply
    28,442.58x = 42,672.06 × 8,724.03
  4. Step 4: Simplify right side
    28,442.58x = 372,272,331.60
  5. Step 5: Solve for x
    x = 372,272,331.60/28,442.58
  6. Step 6: Final answer
    x = 13,088.56

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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.