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Finding the Fourth Proportional to 18,696.63, 25,748.86 and 18,288.39

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Solution

The fourth proportional to 18,696.63, 25,748.86 and 18,288.39 is: 25,186.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.63 : 25,748.86 = 18,288.39 : x
  2. Step 2: Convert to fraction form
    18,696.63/25,748.86 = 18,288.39/x
  3. Step 3: Cross multiply
    18,696.63x = 25,748.86 × 18,288.39
  4. Step 4: Simplify right side
    18,696.63x = 470,905,271.64
  5. Step 5: Solve for x
    x = 470,905,271.64/18,696.63
  6. Step 6: Final answer
    x = 25,186.64

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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.