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Finding the Fourth Proportional to 18,701.22, 25,811.02 and 11,148.03

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Solution

The fourth proportional to 18,701.22, 25,811.02 and 11,148.03 is: 15,386.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701.22 : 25,811.02 = 11,148.03 : x
  2. Step 2: Convert to fraction form
    18,701.22/25,811.02 = 11,148.03/x
  3. Step 3: Cross multiply
    18,701.22x = 25,811.02 × 11,148.03
  4. Step 4: Simplify right side
    18,701.22x = 287,742,025.29
  5. Step 5: Solve for x
    x = 287,742,025.29/18,701.22
  6. Step 6: Final answer
    x = 15,386.27

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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.