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Finding the Fourth Proportional to 18,769, 28,153.86 and 7,087.72

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Solution

The fourth proportional to 18,769, 28,153.86 and 7,087.72 is: 10,631.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,769 : 28,153.86 = 7,087.72 : x
  2. Step 2: Convert to fraction form
    18,769/28,153.86 = 7,087.72/x
  3. Step 3: Cross multiply
    18,769x = 28,153.86 × 7,087.72
  4. Step 4: Simplify right side
    18,769x = 199,546,676.60
  5. Step 5: Solve for x
    x = 199,546,676.60/18,769
  6. Step 6: Final answer
    x = 10,631.72

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1.5x scale

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.