Home / 20,419.67-30,621.72-12,102.01

Finding the Fourth Proportional to 20,419.67, 30,621.72 and 12,102.01

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Solution

The fourth proportional to 20,419.67, 30,621.72 and 12,102.01 is: 18,148.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.67 : 30,621.72 = 12,102.01 : x
  2. Step 2: Convert to fraction form
    20,419.67/30,621.72 = 12,102.01/x
  3. Step 3: Cross multiply
    20,419.67x = 30,621.72 × 12,102.01
  4. Step 4: Simplify right side
    20,419.67x = 370,584,296.45
  5. Step 5: Solve for x
    x = 370,584,296.45/20,419.67
  6. Step 6: Final answer
    x = 18,148.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.