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Finding the Fourth Proportional to 18,670.98, 28,024.05 and 12,435.37

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Solution

The fourth proportional to 18,670.98, 28,024.05 and 12,435.37 is: 18,664.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,670.98 : 28,024.05 = 12,435.37 : x
  2. Step 2: Convert to fraction form
    18,670.98/28,024.05 = 12,435.37/x
  3. Step 3: Cross multiply
    18,670.98x = 28,024.05 × 12,435.37
  4. Step 4: Simplify right side
    18,670.98x = 348,489,529.88
  5. Step 5: Solve for x
    x = 348,489,529.88/18,670.98
  6. Step 6: Final answer
    x = 18,664.77

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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.