Home / 20,881.06-28,814.07-11,926.78

Finding the Fourth Proportional to 20,881.06, 28,814.07 and 11,926.78

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Solution

The fourth proportional to 20,881.06, 28,814.07 and 11,926.78 is: 16,457.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.06 : 28,814.07 = 11,926.78 : x
  2. Step 2: Convert to fraction form
    20,881.06/28,814.07 = 11,926.78/x
  3. Step 3: Cross multiply
    20,881.06x = 28,814.07 × 11,926.78
  4. Step 4: Simplify right side
    20,881.06x = 343,659,073.79
  5. Step 5: Solve for x
    x = 343,659,073.79/20,881.06
  6. Step 6: Final answer
    x = 16,457.93

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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.