Home / 20,680.63-28,539.40-11,249.26

Finding the Fourth Proportional to 20,680.63, 28,539.40 and 11,249.26

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Solution

The fourth proportional to 20,680.63, 28,539.40 and 11,249.26 is: 15,524.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.63 : 28,539.40 = 11,249.26 : x
  2. Step 2: Convert to fraction form
    20,680.63/28,539.40 = 11,249.26/x
  3. Step 3: Cross multiply
    20,680.63x = 28,539.40 × 11,249.26
  4. Step 4: Simplify right side
    20,680.63x = 321,047,130.84
  5. Step 5: Solve for x
    x = 321,047,130.84/20,680.63
  6. Step 6: Final answer
    x = 15,524.05

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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.