Home / 20,869.37-28,800.66-11,917.59

Finding the Fourth Proportional to 20,869.37, 28,800.66 and 11,917.59

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Solution

The fourth proportional to 20,869.37, 28,800.66 and 11,917.59 is: 16,446.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.37 : 28,800.66 = 11,917.59 : x
  2. Step 2: Convert to fraction form
    20,869.37/28,800.66 = 11,917.59/x
  3. Step 3: Cross multiply
    20,869.37x = 28,800.66 × 11,917.59
  4. Step 4: Simplify right side
    20,869.37x = 343,234,457.61
  5. Step 5: Solve for x
    x = 343,234,457.61/20,869.37
  6. Step 6: Final answer
    x = 16,446.80

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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.