Home / 20,485.31-28,272.42-11,534.56

Finding the Fourth Proportional to 20,485.31, 28,272.42 and 11,534.56

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Solution

The fourth proportional to 20,485.31, 28,272.42 and 11,534.56 is: 15,919.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.31 : 28,272.42 = 11,534.56 : x
  2. Step 2: Convert to fraction form
    20,485.31/28,272.42 = 11,534.56/x
  3. Step 3: Cross multiply
    20,485.31x = 28,272.42 × 11,534.56
  4. Step 4: Simplify right side
    20,485.31x = 326,109,924.84
  5. Step 5: Solve for x
    x = 326,109,924.84/20,485.31
  6. Step 6: Final answer
    x = 15,919.21

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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.