Home / 13,839.40-20,726.70-8,590.60

Finding the Fourth Proportional to 13,839.40, 20,726.70 and 8,590.60

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Solution

The fourth proportional to 13,839.40, 20,726.70 and 8,590.60 is: 12,865.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,839.40 : 20,726.70 = 8,590.60 : x
  2. Step 2: Convert to fraction form
    13,839.40/20,726.70 = 8,590.60/x
  3. Step 3: Cross multiply
    13,839.40x = 20,726.70 × 8,590.60
  4. Step 4: Simplify right side
    13,839.40x = 178,054,789.02
  5. Step 5: Solve for x
    x = 178,054,789.02/13,839.40
  6. Step 6: Final answer
    x = 12,865.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.