Home / 20,239.40-30,155.61-19,107.63

Finding the Fourth Proportional to 20,239.40, 30,155.61 and 19,107.63

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Solution

The fourth proportional to 20,239.40, 30,155.61 and 19,107.63 is: 28,469.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.40 : 30,155.61 = 19,107.63 : x
  2. Step 2: Convert to fraction form
    20,239.40/30,155.61 = 19,107.63/x
  3. Step 3: Cross multiply
    20,239.40x = 30,155.61 × 19,107.63
  4. Step 4: Simplify right side
    20,239.40x = 576,201,991.99
  5. Step 5: Solve for x
    x = 576,201,991.99/20,239.40
  6. Step 6: Final answer
    x = 28,469.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.