Home / 27,813.21-38,399.67-21,427.77

Finding the Fourth Proportional to 27,813.21, 38,399.67 and 21,427.77

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Solution

The fourth proportional to 27,813.21, 38,399.67 and 21,427.77 is: 29,583.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,813.21 : 38,399.67 = 21,427.77 : x
  2. Step 2: Convert to fraction form
    27,813.21/38,399.67 = 21,427.77/x
  3. Step 3: Cross multiply
    27,813.21x = 38,399.67 × 21,427.77
  4. Step 4: Simplify right side
    27,813.21x = 822,819,296.84
  5. Step 5: Solve for x
    x = 822,819,296.84/27,813.21
  6. Step 6: Final answer
    x = 29,583.76

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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.