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Finding the Fourth Proportional to 18,696.88, 25,749.21 and 18,288.64

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Solution

The fourth proportional to 18,696.88, 25,749.21 and 18,288.64 is: 25,186.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.88 : 25,749.21 = 18,288.64 : x
  2. Step 2: Convert to fraction form
    18,696.88/25,749.21 = 18,288.64/x
  3. Step 3: Cross multiply
    18,696.88x = 25,749.21 × 18,288.64
  4. Step 4: Simplify right side
    18,696.88x = 470,918,050.63
  5. Step 5: Solve for x
    x = 470,918,050.63/18,696.88
  6. Step 6: Final answer
    x = 25,186.98

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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.