Home / 20,586.78-28,409.34-11,512.11

Finding the Fourth Proportional to 20,586.78, 28,409.34 and 11,512.11

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Solution

The fourth proportional to 20,586.78, 28,409.34 and 11,512.11 is: 15,886.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.78 : 28,409.34 = 11,512.11 : x
  2. Step 2: Convert to fraction form
    20,586.78/28,409.34 = 11,512.11/x
  3. Step 3: Cross multiply
    20,586.78x = 28,409.34 × 11,512.11
  4. Step 4: Simplify right side
    20,586.78x = 327,051,447.11
  5. Step 5: Solve for x
    x = 327,051,447.11/20,586.78
  6. Step 6: Final answer
    x = 15,886.48

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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.