Home / 20,686.26-28,537.92-12,725.58

Finding the Fourth Proportional to 20,686.26, 28,537.92 and 12,725.58

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Solution

The fourth proportional to 20,686.26, 28,537.92 and 12,725.58 is: 17,555.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.26 : 28,537.92 = 12,725.58 : x
  2. Step 2: Convert to fraction form
    20,686.26/28,537.92 = 12,725.58/x
  3. Step 3: Cross multiply
    20,686.26x = 28,537.92 × 12,725.58
  4. Step 4: Simplify right side
    20,686.26x = 363,161,583.99
  5. Step 5: Solve for x
    x = 363,161,583.99/20,686.26
  6. Step 6: Final answer
    x = 17,555.69

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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.