Home / 20,289.20-30,428.40-6,249.20

Finding the Fourth Proportional to 20,289.20, 30,428.40 and 6,249.20

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Solution

The fourth proportional to 20,289.20, 30,428.40 and 6,249.20 is: 9,372.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.20 : 30,428.40 = 6,249.20 : x
  2. Step 2: Convert to fraction form
    20,289.20/30,428.40 = 6,249.20/x
  3. Step 3: Cross multiply
    20,289.20x = 30,428.40 × 6,249.20
  4. Step 4: Simplify right side
    20,289.20x = 190,153,157.28
  5. Step 5: Solve for x
    x = 190,153,157.28/20,289.20
  6. Step 6: Final answer
    x = 9,372.14

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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.