Home / 20,419.44-30,622.40-7,938.56

Finding the Fourth Proportional to 20,419.44, 30,622.40 and 7,938.56

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Solution

The fourth proportional to 20,419.44, 30,622.40 and 7,938.56 is: 11,905.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.44 : 30,622.40 = 7,938.56 : x
  2. Step 2: Convert to fraction form
    20,419.44/30,622.40 = 7,938.56/x
  3. Step 3: Cross multiply
    20,419.44x = 30,622.40 × 7,938.56
  4. Step 4: Simplify right side
    20,419.44x = 243,097,759.74
  5. Step 5: Solve for x
    x = 243,097,759.74/20,419.44
  6. Step 6: Final answer
    x = 11,905.21

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1.5x scale

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.