Home / 20,638.56-28,466.64-12,685.26

Finding the Fourth Proportional to 20,638.56, 28,466.64 and 12,685.26

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Solution

The fourth proportional to 20,638.56, 28,466.64 and 12,685.26 is: 17,496.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.56 : 28,466.64 = 12,685.26 : x
  2. Step 2: Convert to fraction form
    20,638.56/28,466.64 = 12,685.26/x
  3. Step 3: Cross multiply
    20,638.56x = 28,466.64 × 12,685.26
  4. Step 4: Simplify right side
    20,638.56x = 361,106,729.73
  5. Step 5: Solve for x
    x = 361,106,729.73/20,638.56
  6. Step 6: Final answer
    x = 17,496.70

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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.