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Finding the Fourth Proportional to 18,807, 28,219.76 and 8,943.72

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Solution

The fourth proportional to 18,807, 28,219.76 and 8,943.72 is: 13,419.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807 : 28,219.76 = 8,943.72 : x
  2. Step 2: Convert to fraction form
    18,807/28,219.76 = 8,943.72/x
  3. Step 3: Cross multiply
    18,807x = 28,219.76 × 8,943.72
  4. Step 4: Simplify right side
    18,807x = 252,389,631.91
  5. Step 5: Solve for x
    x = 252,389,631.91/18,807
  6. Step 6: Final answer
    x = 13,419.98

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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.