Home / 20,777.40-28,696.14-13,735.80

Finding the Fourth Proportional to 20,777.40, 28,696.14 and 13,735.80

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Solution

The fourth proportional to 20,777.40, 28,696.14 and 13,735.80 is: 18,970.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.40 : 28,696.14 = 13,735.80 : x
  2. Step 2: Convert to fraction form
    20,777.40/28,696.14 = 13,735.80/x
  3. Step 3: Cross multiply
    20,777.40x = 28,696.14 × 13,735.80
  4. Step 4: Simplify right side
    20,777.40x = 394,164,439.81
  5. Step 5: Solve for x
    x = 394,164,439.81/20,777.40
  6. Step 6: Final answer
    x = 18,970.83

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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.