Home / 20,490.94-28,278.84-15,446.26

Finding the Fourth Proportional to 20,490.94, 28,278.84 and 15,446.26

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Solution

The fourth proportional to 20,490.94, 28,278.84 and 15,446.26 is: 21,316.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.94 : 28,278.84 = 15,446.26 : x
  2. Step 2: Convert to fraction form
    20,490.94/28,278.84 = 15,446.26/x
  3. Step 3: Cross multiply
    20,490.94x = 28,278.84 × 15,446.26
  4. Step 4: Simplify right side
    20,490.94x = 436,802,315.14
  5. Step 5: Solve for x
    x = 436,802,315.14/20,490.94
  6. Step 6: Final answer
    x = 21,316.85

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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.