Home / 20,938.34-28,893.84-11,505.08

Finding the Fourth Proportional to 20,938.34, 28,893.84 and 11,505.08

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Solution

The fourth proportional to 20,938.34, 28,893.84 and 11,505.08 is: 15,876.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.34 : 28,893.84 = 11,505.08 : x
  2. Step 2: Convert to fraction form
    20,938.34/28,893.84 = 11,505.08/x
  3. Step 3: Cross multiply
    20,938.34x = 28,893.84 × 11,505.08
  4. Step 4: Simplify right side
    20,938.34x = 332,425,940.71
  5. Step 5: Solve for x
    x = 332,425,940.71/20,938.34
  6. Step 6: Final answer
    x = 15,876.42

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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.