Home / 20,862.74-28,784.84-11,907.02

Finding the Fourth Proportional to 20,862.74, 28,784.84 and 11,907.02

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Solution

The fourth proportional to 20,862.74, 28,784.84 and 11,907.02 is: 16,428.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.74 : 28,784.84 = 11,907.02 : x
  2. Step 2: Convert to fraction form
    20,862.74/28,784.84 = 11,907.02/x
  3. Step 3: Cross multiply
    20,862.74x = 28,784.84 × 11,907.02
  4. Step 4: Simplify right side
    20,862.74x = 342,741,665.58
  5. Step 5: Solve for x
    x = 342,741,665.58/20,862.74
  6. Step 6: Final answer
    x = 16,428.41

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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.