Home / 20,889.24-28,827.20-11,457.84

Finding the Fourth Proportional to 20,889.24, 28,827.20 and 11,457.84

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Solution

The fourth proportional to 20,889.24, 28,827.20 and 11,457.84 is: 15,811.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.24 : 28,827.20 = 11,457.84 : x
  2. Step 2: Convert to fraction form
    20,889.24/28,827.20 = 11,457.84/x
  3. Step 3: Cross multiply
    20,889.24x = 28,827.20 × 11,457.84
  4. Step 4: Simplify right side
    20,889.24x = 330,297,445.25
  5. Step 5: Solve for x
    x = 330,297,445.25/20,889.24
  6. Step 6: Final answer
    x = 15,811.85

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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.