Home / 20,619.84-30,919.68-7,470.24

Finding the Fourth Proportional to 20,619.84, 30,919.68 and 7,470.24

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Solution

The fourth proportional to 20,619.84, 30,919.68 and 7,470.24 is: 11,201.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.84 : 30,919.68 = 7,470.24 : x
  2. Step 2: Convert to fraction form
    20,619.84/30,919.68 = 7,470.24/x
  3. Step 3: Cross multiply
    20,619.84x = 30,919.68 × 7,470.24
  4. Step 4: Simplify right side
    20,619.84x = 230,977,430.32
  5. Step 5: Solve for x
    x = 230,977,430.32/20,619.84
  6. Step 6: Final answer
    x = 11,201.71

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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.