Home / 21,183.86-31,776.11-10,091.70

Finding the Fourth Proportional to 21,183.86, 31,776.11 and 10,091.70

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Solution

The fourth proportional to 21,183.86, 31,776.11 and 10,091.70 is: 15,137.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.86 : 31,776.11 = 10,091.70 : x
  2. Step 2: Convert to fraction form
    21,183.86/31,776.11 = 10,091.70/x
  3. Step 3: Cross multiply
    21,183.86x = 31,776.11 × 10,091.70
  4. Step 4: Simplify right side
    21,183.86x = 320,674,969.29
  5. Step 5: Solve for x
    x = 320,674,969.29/21,183.86
  6. Step 6: Final answer
    x = 15,137.70

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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.