Home / 21,216.21-31,809.16-9,965.27

Finding the Fourth Proportional to 21,216.21, 31,809.16 and 9,965.27

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Solution

The fourth proportional to 21,216.21, 31,809.16 and 9,965.27 is: 14,940.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.21 : 31,809.16 = 9,965.27 : x
  2. Step 2: Convert to fraction form
    21,216.21/31,809.16 = 9,965.27/x
  3. Step 3: Cross multiply
    21,216.21x = 31,809.16 × 9,965.27
  4. Step 4: Simplify right side
    21,216.21x = 316,986,867.87
  5. Step 5: Solve for x
    x = 316,986,867.87/21,216.21
  6. Step 6: Final answer
    x = 14,940.79

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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.