Home / 20,824.58-28,734.57-11,872.10

Finding the Fourth Proportional to 20,824.58, 28,734.57 and 11,872.10

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Solution

The fourth proportional to 20,824.58, 28,734.57 and 11,872.10 is: 16,381.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,824.58 : 28,734.57 = 11,872.10 : x
  2. Step 2: Convert to fraction form
    20,824.58/28,734.57 = 11,872.10/x
  3. Step 3: Cross multiply
    20,824.58x = 28,734.57 × 11,872.10
  4. Step 4: Simplify right side
    20,824.58x = 341,139,688.50
  5. Step 5: Solve for x
    x = 341,139,688.50/20,824.58
  6. Step 6: Final answer
    x = 16,381.59

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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.