Home / 20,981.26-28,953.99-11,549.82

Finding the Fourth Proportional to 20,981.26, 28,953.99 and 11,549.82

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Solution

The fourth proportional to 20,981.26, 28,953.99 and 11,549.82 is: 15,938.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.26 : 28,953.99 = 11,549.82 : x
  2. Step 2: Convert to fraction form
    20,981.26/28,953.99 = 11,549.82/x
  3. Step 3: Cross multiply
    20,981.26x = 28,953.99 × 11,549.82
  4. Step 4: Simplify right side
    20,981.26x = 334,413,481.36
  5. Step 5: Solve for x
    x = 334,413,481.36/20,981.26
  6. Step 6: Final answer
    x = 15,938.67

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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.