Home / 20,784.48-28,662.09-12,825.02

Finding the Fourth Proportional to 20,784.48, 28,662.09 and 12,825.02

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Solution

The fourth proportional to 20,784.48, 28,662.09 and 12,825.02 is: 17,685.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.48 : 28,662.09 = 12,825.02 : x
  2. Step 2: Convert to fraction form
    20,784.48/28,662.09 = 12,825.02/x
  3. Step 3: Cross multiply
    20,784.48x = 28,662.09 × 12,825.02
  4. Step 4: Simplify right side
    20,784.48x = 367,591,734.18
  5. Step 5: Solve for x
    x = 367,591,734.18/20,784.48
  6. Step 6: Final answer
    x = 17,685.88

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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.