Home / 13,481.89-20,209.77-5,155.50

Finding the Fourth Proportional to 13,481.89, 20,209.77 and 5,155.50

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Solution

The fourth proportional to 13,481.89, 20,209.77 and 5,155.50 is: 7,728.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,481.89 : 20,209.77 = 5,155.50 : x
  2. Step 2: Convert to fraction form
    13,481.89/20,209.77 = 5,155.50/x
  3. Step 3: Cross multiply
    13,481.89x = 20,209.77 × 5,155.50
  4. Step 4: Simplify right side
    13,481.89x = 104,191,381.07
  5. Step 5: Solve for x
    x = 104,191,381.07/13,481.89
  6. Step 6: Final answer
    x = 7,728.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.