Home / 13,439.21-18,544.52-7,987.43

Finding the Fourth Proportional to 13,439.21, 18,544.52 and 7,987.43

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Solution

The fourth proportional to 13,439.21, 18,544.52 and 7,987.43 is: 11,021.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.21 : 18,544.52 = 7,987.43 : x
  2. Step 2: Convert to fraction form
    13,439.21/18,544.52 = 7,987.43/x
  3. Step 3: Cross multiply
    13,439.21x = 18,544.52 × 7,987.43
  4. Step 4: Simplify right side
    13,439.21x = 148,122,994.94
  5. Step 5: Solve for x
    x = 148,122,994.94/13,439.21
  6. Step 6: Final answer
    x = 11,021.71

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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.