Home / 13,851.80-20,775.08-3,720.32

Finding the Fourth Proportional to 13,851.80, 20,775.08 and 3,720.32

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Solution

The fourth proportional to 13,851.80, 20,775.08 and 3,720.32 is: 5,579.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,851.80 : 20,775.08 = 3,720.32 : x
  2. Step 2: Convert to fraction form
    13,851.80/20,775.08 = 3,720.32/x
  3. Step 3: Cross multiply
    13,851.80x = 20,775.08 × 3,720.32
  4. Step 4: Simplify right side
    13,851.80x = 77,289,945.63
  5. Step 5: Solve for x
    x = 77,289,945.63/13,851.80
  6. Step 6: Final answer
    x = 5,579.78

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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.