Home / 20,855.25-28,783.02-11,900.70

Finding the Fourth Proportional to 20,855.25, 28,783.02 and 11,900.70

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Solution

The fourth proportional to 20,855.25, 28,783.02 and 11,900.70 is: 16,424.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.25 : 28,783.02 = 11,900.70 : x
  2. Step 2: Convert to fraction form
    20,855.25/28,783.02 = 11,900.70/x
  3. Step 3: Cross multiply
    20,855.25x = 28,783.02 × 11,900.70
  4. Step 4: Simplify right side
    20,855.25x = 342,538,086.11
  5. Step 5: Solve for x
    x = 342,538,086.11/20,855.25
  6. Step 6: Final answer
    x = 16,424.55

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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.