Home / 21,079.01-31,609.25-11,215.94

Finding the Fourth Proportional to 21,079.01, 31,609.25 and 11,215.94

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Solution

The fourth proportional to 21,079.01, 31,609.25 and 11,215.94 is: 16,818.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.01 : 31,609.25 = 11,215.94 : x
  2. Step 2: Convert to fraction form
    21,079.01/31,609.25 = 11,215.94/x
  3. Step 3: Cross multiply
    21,079.01x = 31,609.25 × 11,215.94
  4. Step 4: Simplify right side
    21,079.01x = 354,527,561.85
  5. Step 5: Solve for x
    x = 354,527,561.85/21,079.01
  6. Step 6: Final answer
    x = 16,818.99

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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.