Home / 13,780.75-20,670.72-4,420.39

Finding the Fourth Proportional to 13,780.75, 20,670.72 and 4,420.39

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Solution

The fourth proportional to 13,780.75, 20,670.72 and 4,420.39 is: 6,630.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.75 : 20,670.72 = 4,420.39 : x
  2. Step 2: Convert to fraction form
    13,780.75/20,670.72 = 4,420.39/x
  3. Step 3: Cross multiply
    13,780.75x = 20,670.72 × 4,420.39
  4. Step 4: Simplify right side
    13,780.75x = 91,372,643.98
  5. Step 5: Solve for x
    x = 91,372,643.98/13,780.75
  6. Step 6: Final answer
    x = 6,630.46

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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.