Home / 20,644.70-28,424.94-18,219.56

Finding the Fourth Proportional to 20,644.70, 28,424.94 and 18,219.56

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Solution

The fourth proportional to 20,644.70, 28,424.94 and 18,219.56 is: 25,085.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.70 : 28,424.94 = 18,219.56 : x
  2. Step 2: Convert to fraction form
    20,644.70/28,424.94 = 18,219.56/x
  3. Step 3: Cross multiply
    20,644.70x = 28,424.94 × 18,219.56
  4. Step 4: Simplify right side
    20,644.70x = 517,889,899.83
  5. Step 5: Solve for x
    x = 517,889,899.83/20,644.70
  6. Step 6: Final answer
    x = 25,085.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.