Home / 20,930.40-28,883.80-12,546.88

Finding the Fourth Proportional to 20,930.40, 28,883.80 and 12,546.88

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Solution

The fourth proportional to 20,930.40, 28,883.80 and 12,546.88 is: 17,314.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.40 : 28,883.80 = 12,546.88 : x
  2. Step 2: Convert to fraction form
    20,930.40/28,883.80 = 12,546.88/x
  3. Step 3: Cross multiply
    20,930.40x = 28,883.80 × 12,546.88
  4. Step 4: Simplify right side
    20,930.40x = 362,401,572.54
  5. Step 5: Solve for x
    x = 362,401,572.54/20,930.40
  6. Step 6: Final answer
    x = 17,314.60

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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.