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Finding the Fourth Proportional to 18,245, 25,178.13 and 9,861.50

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Solution

The fourth proportional to 18,245, 25,178.13 and 9,861.50 is: 13,608.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,245 : 25,178.13 = 9,861.50 : x
  2. Step 2: Convert to fraction form
    18,245/25,178.13 = 9,861.50/x
  3. Step 3: Cross multiply
    18,245x = 25,178.13 × 9,861.50
  4. Step 4: Simplify right side
    18,245x = 248,294,129.00
  5. Step 5: Solve for x
    x = 248,294,129.00/18,245
  6. Step 6: Final answer
    x = 13,608.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.