Home / 21,178.04-29,231.44-13,215.56

Finding the Fourth Proportional to 21,178.04, 29,231.44 and 13,215.56

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Solution

The fourth proportional to 21,178.04, 29,231.44 and 13,215.56 is: 18,241.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.04 : 29,231.44 = 13,215.56 : x
  2. Step 2: Convert to fraction form
    21,178.04/29,231.44 = 13,215.56/x
  3. Step 3: Cross multiply
    21,178.04x = 29,231.44 × 13,215.56
  4. Step 4: Simplify right side
    21,178.04x = 386,309,849.21
  5. Step 5: Solve for x
    x = 386,309,849.21/21,178.04
  6. Step 6: Final answer
    x = 18,241.06

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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.