Home / 21,326.14-31,989.20-10,931.26

Finding the Fourth Proportional to 21,326.14, 31,989.20 and 10,931.26

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Solution

The fourth proportional to 21,326.14, 31,989.20 and 10,931.26 is: 16,396.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,326.14 : 31,989.20 = 10,931.26 : x
  2. Step 2: Convert to fraction form
    21,326.14/31,989.20 = 10,931.26/x
  3. Step 3: Cross multiply
    21,326.14x = 31,989.20 × 10,931.26
  4. Step 4: Simplify right side
    21,326.14x = 349,682,262.39
  5. Step 5: Solve for x
    x = 349,682,262.39/21,326.14
  6. Step 6: Final answer
    x = 16,396.88

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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.