Home / 18,991.26-28,444.57-13,427.78

Finding the Fourth Proportional to 18,991.26, 28,444.57 and 13,427.78

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Solution

The fourth proportional to 18,991.26, 28,444.57 and 13,427.78 is: 20,111.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.26 : 28,444.57 = 13,427.78 : x
  2. Step 2: Convert to fraction form
    18,991.26/28,444.57 = 13,427.78/x
  3. Step 3: Cross multiply
    18,991.26x = 28,444.57 × 13,427.78
  4. Step 4: Simplify right side
    18,991.26x = 381,947,252.36
  5. Step 5: Solve for x
    x = 381,947,252.36/18,991.26
  6. Step 6: Final answer
    x = 20,111.74

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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.