Home / 21,879.20-30,190.23-12,317.46

Finding the Fourth Proportional to 21,879.20, 30,190.23 and 12,317.46

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Solution

The fourth proportional to 21,879.20, 30,190.23 and 12,317.46 is: 16,996.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.20 : 30,190.23 = 12,317.46 : x
  2. Step 2: Convert to fraction form
    21,879.20/30,190.23 = 12,317.46/x
  3. Step 3: Cross multiply
    21,879.20x = 30,190.23 × 12,317.46
  4. Step 4: Simplify right side
    21,879.20x = 371,866,950.42
  5. Step 5: Solve for x
    x = 371,866,950.42/21,879.20
  6. Step 6: Final answer
    x = 16,996.37

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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.