Home / 20,683.74-28,534.41-12,721.26

Finding the Fourth Proportional to 20,683.74, 28,534.41 and 12,721.26

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Solution

The fourth proportional to 20,683.74, 28,534.41 and 12,721.26 is: 17,549.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.74 : 28,534.41 = 12,721.26 : x
  2. Step 2: Convert to fraction form
    20,683.74/28,534.41 = 12,721.26/x
  3. Step 3: Cross multiply
    20,683.74x = 28,534.41 × 12,721.26
  4. Step 4: Simplify right side
    20,683.74x = 362,993,648.56
  5. Step 5: Solve for x
    x = 362,993,648.56/20,683.74
  6. Step 6: Final answer
    x = 17,549.71

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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.