Home / 21,739.56-30,002.22-12,309.54

Finding the Fourth Proportional to 21,739.56, 30,002.22 and 12,309.54

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Solution

The fourth proportional to 21,739.56, 30,002.22 and 12,309.54 is: 16,988.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,739.56 : 30,002.22 = 12,309.54 : x
  2. Step 2: Convert to fraction form
    21,739.56/30,002.22 = 12,309.54/x
  3. Step 3: Cross multiply
    21,739.56x = 30,002.22 × 12,309.54
  4. Step 4: Simplify right side
    21,739.56x = 369,313,527.18
  5. Step 5: Solve for x
    x = 369,313,527.18/21,739.56
  6. Step 6: Final answer
    x = 16,988.09

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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.