Home / 20,830.96-28,747.44-11,399.50

Finding the Fourth Proportional to 20,830.96, 28,747.44 and 11,399.50

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Solution

The fourth proportional to 20,830.96, 28,747.44 and 11,399.50 is: 15,731.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.96 : 28,747.44 = 11,399.50 : x
  2. Step 2: Convert to fraction form
    20,830.96/28,747.44 = 11,399.50/x
  3. Step 3: Cross multiply
    20,830.96x = 28,747.44 × 11,399.50
  4. Step 4: Simplify right side
    20,830.96x = 327,706,442.28
  5. Step 5: Solve for x
    x = 327,706,442.28/20,830.96
  6. Step 6: Final answer
    x = 15,731.70

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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.