Home / 20,687.74-28,539.93-12,725.26

Finding the Fourth Proportional to 20,687.74, 28,539.93 and 12,725.26

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Solution

The fourth proportional to 20,687.74, 28,539.93 and 12,725.26 is: 17,555.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.74 : 28,539.93 = 12,725.26 : x
  2. Step 2: Convert to fraction form
    20,687.74/28,539.93 = 12,725.26/x
  3. Step 3: Cross multiply
    20,687.74x = 28,539.93 × 12,725.26
  4. Step 4: Simplify right side
    20,687.74x = 363,178,029.63
  5. Step 5: Solve for x
    x = 363,178,029.63/20,687.74
  6. Step 6: Final answer
    x = 17,555.23

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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.