Home / 30,139.32-41,578.98-21,183.96

Finding the Fourth Proportional to 30,139.32, 41,578.98 and 21,183.96

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Solution

The fourth proportional to 30,139.32, 41,578.98 and 21,183.96 is: 29,224.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,139.32 : 41,578.98 = 21,183.96 : x
  2. Step 2: Convert to fraction form
    30,139.32/41,578.98 = 21,183.96/x
  3. Step 3: Cross multiply
    30,139.32x = 41,578.98 × 21,183.96
  4. Step 4: Simplify right side
    30,139.32x = 880,807,449.16
  5. Step 5: Solve for x
    x = 880,807,449.16/30,139.32
  6. Step 6: Final answer
    x = 29,224.53

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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.