Home / 21,010.11-28,993.95-11,578.67

Finding the Fourth Proportional to 21,010.11, 28,993.95 and 11,578.67

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Solution

The fourth proportional to 21,010.11, 28,993.95 and 11,578.67 is: 15,978.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.11 : 28,993.95 = 11,578.67 : x
  2. Step 2: Convert to fraction form
    21,010.11/28,993.95 = 11,578.67/x
  3. Step 3: Cross multiply
    21,010.11x = 28,993.95 × 11,578.67
  4. Step 4: Simplify right side
    21,010.11x = 335,711,379.05
  5. Step 5: Solve for x
    x = 335,711,379.05/21,010.11
  6. Step 6: Final answer
    x = 15,978.56

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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.