Home / 20,980.70-28,952.44-11,420.60

Finding the Fourth Proportional to 20,980.70, 28,952.44 and 11,420.60

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Solution

The fourth proportional to 20,980.70, 28,952.44 and 11,420.60 is: 15,759.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.70 : 28,952.44 = 11,420.60 : x
  2. Step 2: Convert to fraction form
    20,980.70/28,952.44 = 11,420.60/x
  3. Step 3: Cross multiply
    20,980.70x = 28,952.44 × 11,420.60
  4. Step 4: Simplify right side
    20,980.70x = 330,654,236.26
  5. Step 5: Solve for x
    x = 330,654,236.26/20,980.70
  6. Step 6: Final answer
    x = 15,759.92

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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.