Home / 13,640.72-20,460.36-3,780.32

Finding the Fourth Proportional to 13,640.72, 20,460.36 and 3,780.32

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Solution

The fourth proportional to 13,640.72, 20,460.36 and 3,780.32 is: 5,670.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.72 : 20,460.36 = 3,780.32 : x
  2. Step 2: Convert to fraction form
    13,640.72/20,460.36 = 3,780.32/x
  3. Step 3: Cross multiply
    13,640.72x = 20,460.36 × 3,780.32
  4. Step 4: Simplify right side
    13,640.72x = 77,346,708.12
  5. Step 5: Solve for x
    x = 77,346,708.12/13,640.72
  6. Step 6: Final answer
    x = 5,670.28

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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.