Home / 20,436.56-28,202.21-11,485.58

Finding the Fourth Proportional to 20,436.56, 28,202.21 and 11,485.58

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Solution

The fourth proportional to 20,436.56, 28,202.21 and 11,485.58 is: 15,849.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,436.56 : 28,202.21 = 11,485.58 : x
  2. Step 2: Convert to fraction form
    20,436.56/28,202.21 = 11,485.58/x
  3. Step 3: Cross multiply
    20,436.56x = 28,202.21 × 11,485.58
  4. Step 4: Simplify right side
    20,436.56x = 323,918,742.40
  5. Step 5: Solve for x
    x = 323,918,742.40/20,436.56
  6. Step 6: Final answer
    x = 15,849.96

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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.