Home / 20,457.74-28,229.39-11,505.05

Finding the Fourth Proportional to 20,457.74, 28,229.39 and 11,505.05

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Solution

The fourth proportional to 20,457.74, 28,229.39 and 11,505.05 is: 15,875.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,457.74 : 28,229.39 = 11,505.05 : x
  2. Step 2: Convert to fraction form
    20,457.74/28,229.39 = 11,505.05/x
  3. Step 3: Cross multiply
    20,457.74x = 28,229.39 × 11,505.05
  4. Step 4: Simplify right side
    20,457.74x = 324,780,501.09
  5. Step 5: Solve for x
    x = 324,780,501.09/20,457.74
  6. Step 6: Final answer
    x = 15,875.68

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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.