Home / 20,586.44-28,409.31-11,155.01

Finding the Fourth Proportional to 20,586.44, 28,409.31 and 11,155.01

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Solution

The fourth proportional to 20,586.44, 28,409.31 and 11,155.01 is: 15,393.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.44 : 28,409.31 = 11,155.01 : x
  2. Step 2: Convert to fraction form
    20,586.44/28,409.31 = 11,155.01/x
  3. Step 3: Cross multiply
    20,586.44x = 28,409.31 × 11,155.01
  4. Step 4: Simplify right side
    20,586.44x = 316,906,137.14
  5. Step 5: Solve for x
    x = 316,906,137.14/20,586.44
  6. Step 6: Final answer
    x = 15,393.93

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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.