Home / 28,102.81-38,778.56-16,770.21

Finding the Fourth Proportional to 28,102.81, 38,778.56 and 16,770.21

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Solution

The fourth proportional to 28,102.81, 38,778.56 and 16,770.21 is: 23,140.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.81 : 38,778.56 = 16,770.21 : x
  2. Step 2: Convert to fraction form
    28,102.81/38,778.56 = 16,770.21/x
  3. Step 3: Cross multiply
    28,102.81x = 38,778.56 × 16,770.21
  4. Step 4: Simplify right side
    28,102.81x = 650,324,400.80
  5. Step 5: Solve for x
    x = 650,324,400.80/28,102.81
  6. Step 6: Final answer
    x = 23,140.90

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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.