Home / 21,260.00-31,879.37-12,378.25

Finding the Fourth Proportional to 21,260.00, 31,879.37 and 12,378.25

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Solution

The fourth proportional to 21,260.00, 31,879.37 and 12,378.25 is: 18,561.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,260.00 : 31,879.37 = 12,378.25 : x
  2. Step 2: Convert to fraction form
    21,260.00/31,879.37 = 12,378.25/x
  3. Step 3: Cross multiply
    21,260.00x = 31,879.37 × 12,378.25
  4. Step 4: Simplify right side
    21,260.00x = 394,610,882.50
  5. Step 5: Solve for x
    x = 394,610,882.50/21,260.00
  6. Step 6: Final answer
    x = 18,561.19

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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.