Home / 20,707.91-28,579.31-11,754.57

Finding the Fourth Proportional to 20,707.91, 28,579.31 and 11,754.57

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Solution

The fourth proportional to 20,707.91, 28,579.31 and 11,754.57 is: 16,222.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.91 : 28,579.31 = 11,754.57 : x
  2. Step 2: Convert to fraction form
    20,707.91/28,579.31 = 11,754.57/x
  3. Step 3: Cross multiply
    20,707.91x = 28,579.31 × 11,754.57
  4. Step 4: Simplify right side
    20,707.91x = 335,937,499.95
  5. Step 5: Solve for x
    x = 335,937,499.95/20,707.91
  6. Step 6: Final answer
    x = 16,222.67

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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.