Home / 13,739.53-18,960.68-8,074.40

Finding the Fourth Proportional to 13,739.53, 18,960.68 and 8,074.40

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Solution

The fourth proportional to 13,739.53, 18,960.68 and 8,074.40 is: 11,142.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.53 : 18,960.68 = 8,074.40 : x
  2. Step 2: Convert to fraction form
    13,739.53/18,960.68 = 8,074.40/x
  3. Step 3: Cross multiply
    13,739.53x = 18,960.68 × 8,074.40
  4. Step 4: Simplify right side
    13,739.53x = 153,096,114.59
  5. Step 5: Solve for x
    x = 153,096,114.59/13,739.53
  6. Step 6: Final answer
    x = 11,142.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.