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Finding the Fourth Proportional to 28,499.98, 42,739.02 and 11,867.86

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Solution

The fourth proportional to 28,499.98, 42,739.02 and 11,867.86 is: 17,797.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,499.98 : 42,739.02 = 11,867.86 : x
  2. Step 2: Convert to fraction form
    28,499.98/42,739.02 = 11,867.86/x
  3. Step 3: Cross multiply
    28,499.98x = 42,739.02 × 11,867.86
  4. Step 4: Simplify right side
    28,499.98x = 507,220,705.90
  5. Step 5: Solve for x
    x = 507,220,705.90/28,499.98
  6. Step 6: Final answer
    x = 17,797.23

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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.