Home / 20,319.88-28,043.76-11,369.64

Finding the Fourth Proportional to 20,319.88, 28,043.76 and 11,369.64

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Solution

The fourth proportional to 20,319.88, 28,043.76 and 11,369.64 is: 15,691.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.88 : 28,043.76 = 11,369.64 : x
  2. Step 2: Convert to fraction form
    20,319.88/28,043.76 = 11,369.64/x
  3. Step 3: Cross multiply
    20,319.88x = 28,043.76 × 11,369.64
  4. Step 4: Simplify right side
    20,319.88x = 318,847,455.45
  5. Step 5: Solve for x
    x = 318,847,455.45/20,319.88
  6. Step 6: Final answer
    x = 15,691.40

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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.