Home / 20,402.96-28,157.16-11,450

Finding the Fourth Proportional to 20,402.96, 28,157.16 and 11,450

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Solution

The fourth proportional to 20,402.96, 28,157.16 and 11,450 is: 15,801.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.96 : 28,157.16 = 11,450 : x
  2. Step 2: Convert to fraction form
    20,402.96/28,157.16 = 11,450/x
  3. Step 3: Cross multiply
    20,402.96x = 28,157.16 × 11,450
  4. Step 4: Simplify right side
    20,402.96x = 322,399,482
  5. Step 5: Solve for x
    x = 322,399,482/20,402.96
  6. Step 6: Final answer
    x = 15,801.60

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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.