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Finding the Fourth Proportional to 18,172.60, 25,071.70 and 11,888.60

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Solution

The fourth proportional to 18,172.60, 25,071.70 and 11,888.60 is: 16,402.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,172.60 : 25,071.70 = 11,888.60 : x
  2. Step 2: Convert to fraction form
    18,172.60/25,071.70 = 11,888.60/x
  3. Step 3: Cross multiply
    18,172.60x = 25,071.70 × 11,888.60
  4. Step 4: Simplify right side
    18,172.60x = 298,067,412.62
  5. Step 5: Solve for x
    x = 298,067,412.62/18,172.60
  6. Step 6: Final answer
    x = 16,402.02

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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.