Home / 21,079.38-31,609.80-11,216.31

Finding the Fourth Proportional to 21,079.38, 31,609.80 and 11,216.31

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Solution

The fourth proportional to 21,079.38, 31,609.80 and 11,216.31 is: 16,819.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.38 : 31,609.80 = 11,216.31 : x
  2. Step 2: Convert to fraction form
    21,079.38/31,609.80 = 11,216.31/x
  3. Step 3: Cross multiply
    21,079.38x = 31,609.80 × 11,216.31
  4. Step 4: Simplify right side
    21,079.38x = 354,545,315.84
  5. Step 5: Solve for x
    x = 354,545,315.84/21,079.38
  6. Step 6: Final answer
    x = 16,819.53

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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.