Home / 20,993.11-28,969.17-11,561.67

Finding the Fourth Proportional to 20,993.11, 28,969.17 and 11,561.67

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Solution

The fourth proportional to 20,993.11, 28,969.17 and 11,561.67 is: 15,954.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.11 : 28,969.17 = 11,561.67 : x
  2. Step 2: Convert to fraction form
    20,993.11/28,969.17 = 11,561.67/x
  3. Step 3: Cross multiply
    20,993.11x = 28,969.17 × 11,561.67
  4. Step 4: Simplify right side
    20,993.11x = 334,931,838.87
  5. Step 5: Solve for x
    x = 334,931,838.87/20,993.11
  6. Step 6: Final answer
    x = 15,954.37

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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.