Home / 21,728.66-29,986.01-13,231.14

Finding the Fourth Proportional to 21,728.66, 29,986.01 and 13,231.14

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Solution

The fourth proportional to 21,728.66, 29,986.01 and 13,231.14 is: 18,259.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.66 : 29,986.01 = 13,231.14 : x
  2. Step 2: Convert to fraction form
    21,728.66/29,986.01 = 13,231.14/x
  3. Step 3: Cross multiply
    21,728.66x = 29,986.01 × 13,231.14
  4. Step 4: Simplify right side
    21,728.66x = 396,749,030.20
  5. Step 5: Solve for x
    x = 396,749,030.20/21,728.66
  6. Step 6: Final answer
    x = 18,259.25

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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.