Home / 20,782.14-28,676.88-13,122.51

Finding the Fourth Proportional to 20,782.14, 28,676.88 and 13,122.51

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Solution

The fourth proportional to 20,782.14, 28,676.88 and 13,122.51 is: 18,107.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.14 : 28,676.88 = 13,122.51 : x
  2. Step 2: Convert to fraction form
    20,782.14/28,676.88 = 13,122.51/x
  3. Step 3: Cross multiply
    20,782.14x = 28,676.88 × 13,122.51
  4. Step 4: Simplify right side
    20,782.14x = 376,312,644.57
  5. Step 5: Solve for x
    x = 376,312,644.57/20,782.14
  6. Step 6: Final answer
    x = 18,107.50

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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.