Home / 21,986.92-30,345.06-13,606.12

Finding the Fourth Proportional to 21,986.92, 30,345.06 and 13,606.12

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Solution

The fourth proportional to 21,986.92, 30,345.06 and 13,606.12 is: 18,778.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.92 : 30,345.06 = 13,606.12 : x
  2. Step 2: Convert to fraction form
    21,986.92/30,345.06 = 13,606.12/x
  3. Step 3: Cross multiply
    21,986.92x = 30,345.06 × 13,606.12
  4. Step 4: Simplify right side
    21,986.92x = 412,878,527.77
  5. Step 5: Solve for x
    x = 412,878,527.77/21,986.92
  6. Step 6: Final answer
    x = 18,778.37

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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.