Home / 13,848.21-20,739.20-7,987.05

Finding the Fourth Proportional to 13,848.21, 20,739.20 and 7,987.05

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Solution

The fourth proportional to 13,848.21, 20,739.20 and 7,987.05 is: 11,961.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,848.21 : 20,739.20 = 7,987.05 : x
  2. Step 2: Convert to fraction form
    13,848.21/20,739.20 = 7,987.05/x
  3. Step 3: Cross multiply
    13,848.21x = 20,739.20 × 7,987.05
  4. Step 4: Simplify right side
    13,848.21x = 165,645,027.36
  5. Step 5: Solve for x
    x = 165,645,027.36/13,848.21
  6. Step 6: Final answer
    x = 11,961.48

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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.