Home / 20,938.88-28,884.12-13,268.12

Finding the Fourth Proportional to 20,938.88, 28,884.12 and 13,268.12

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Solution

The fourth proportional to 20,938.88, 28,884.12 and 13,268.12 is: 18,302.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.88 : 28,884.12 = 13,268.12 : x
  2. Step 2: Convert to fraction form
    20,938.88/28,884.12 = 13,268.12/x
  3. Step 3: Cross multiply
    20,938.88x = 28,884.12 × 13,268.12
  4. Step 4: Simplify right side
    20,938.88x = 383,237,970.25
  5. Step 5: Solve for x
    x = 383,237,970.25/20,938.88
  6. Step 6: Final answer
    x = 18,302.70

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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.