Home / 20,784.98-28,662.79-12,825.52

Finding the Fourth Proportional to 20,784.98, 28,662.79 and 12,825.52

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Solution

The fourth proportional to 20,784.98, 28,662.79 and 12,825.52 is: 17,686.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.98 : 28,662.79 = 12,825.52 : x
  2. Step 2: Convert to fraction form
    20,784.98/28,662.79 = 12,825.52/x
  3. Step 3: Cross multiply
    20,784.98x = 28,662.79 × 12,825.52
  4. Step 4: Simplify right side
    20,784.98x = 367,614,978.96
  5. Step 5: Solve for x
    x = 367,614,978.96/20,784.98
  6. Step 6: Final answer
    x = 17,686.57

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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.