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Finding the Fourth Proportional to 20,642.51, 30,933.39 and 9,230.60

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Solution

The fourth proportional to 20,642.51, 30,933.39 and 9,230.60 is: 13,832.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.51 : 30,933.39 = 9,230.60 : x
  2. Step 2: Convert to fraction form
    20,642.51/30,933.39 = 9,230.60/x
  3. Step 3: Cross multiply
    20,642.51x = 30,933.39 × 9,230.60
  4. Step 4: Simplify right side
    20,642.51x = 285,533,595.07
  5. Step 5: Solve for x
    x = 285,533,595.07/20,642.51
  6. Step 6: Final answer
    x = 13,832.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.