Home / 12,816.40-19,181.40-11,261.20

Finding the Fourth Proportional to 12,816.40, 19,181.40 and 11,261.20

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Solution

The fourth proportional to 12,816.40, 19,181.40 and 11,261.20 is: 16,853.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,816.40 : 19,181.40 = 11,261.20 : x
  2. Step 2: Convert to fraction form
    12,816.40/19,181.40 = 11,261.20/x
  3. Step 3: Cross multiply
    12,816.40x = 19,181.40 × 11,261.20
  4. Step 4: Simplify right side
    12,816.40x = 216,005,581.68
  5. Step 5: Solve for x
    x = 216,005,581.68/12,816.40
  6. Step 6: Final answer
    x = 16,853.84

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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.