Home / 13,787.09-20,670.55-4,421.78

Finding the Fourth Proportional to 13,787.09, 20,670.55 and 4,421.78

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Solution

The fourth proportional to 13,787.09, 20,670.55 and 4,421.78 is: 6,629.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.09 : 20,670.55 = 4,421.78 : x
  2. Step 2: Convert to fraction form
    13,787.09/20,670.55 = 4,421.78/x
  3. Step 3: Cross multiply
    13,787.09x = 20,670.55 × 4,421.78
  4. Step 4: Simplify right side
    13,787.09x = 91,400,499.12
  5. Step 5: Solve for x
    x = 91,400,499.12/13,787.09
  6. Step 6: Final answer
    x = 6,629.43

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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.