Home / 20,853.58-28,768.73-16,390.31

Finding the Fourth Proportional to 20,853.58, 28,768.73 and 16,390.31

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Solution

The fourth proportional to 20,853.58, 28,768.73 and 16,390.31 is: 22,611.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.58 : 28,768.73 = 16,390.31 : x
  2. Step 2: Convert to fraction form
    20,853.58/28,768.73 = 16,390.31/x
  3. Step 3: Cross multiply
    20,853.58x = 28,768.73 × 16,390.31
  4. Step 4: Simplify right side
    20,853.58x = 471,528,177.21
  5. Step 5: Solve for x
    x = 471,528,177.21/20,853.58
  6. Step 6: Final answer
    x = 22,611.38

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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.