Home / 13,231.40-19,847.10-12,648.20

Finding the Fourth Proportional to 13,231.40, 19,847.10 and 12,648.20

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Solution

The fourth proportional to 13,231.40, 19,847.10 and 12,648.20 is: 18,972.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,231.40 : 19,847.10 = 12,648.20 : x
  2. Step 2: Convert to fraction form
    13,231.40/19,847.10 = 12,648.20/x
  3. Step 3: Cross multiply
    13,231.40x = 19,847.10 × 12,648.20
  4. Step 4: Simplify right side
    13,231.40x = 251,030,090.22
  5. Step 5: Solve for x
    x = 251,030,090.22/13,231.40
  6. Step 6: Final answer
    x = 18,972.30

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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.