Home / 20,619.50-30,947.47-13,579.79

Finding the Fourth Proportional to 20,619.50, 30,947.47 and 13,579.79

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Solution

The fourth proportional to 20,619.50, 30,947.47 and 13,579.79 is: 20,381.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.50 : 30,947.47 = 13,579.79 : x
  2. Step 2: Convert to fraction form
    20,619.50/30,947.47 = 13,579.79/x
  3. Step 3: Cross multiply
    20,619.50x = 30,947.47 × 13,579.79
  4. Step 4: Simplify right side
    20,619.50x = 420,259,954.94
  5. Step 5: Solve for x
    x = 420,259,954.94/20,619.50
  6. Step 6: Final answer
    x = 20,381.68

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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.