Home / 20,750.88-28,636.10-11,319.42

Finding the Fourth Proportional to 20,750.88, 28,636.10 and 11,319.42

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Solution

The fourth proportional to 20,750.88, 28,636.10 and 11,319.42 is: 15,620.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.88 : 28,636.10 = 11,319.42 : x
  2. Step 2: Convert to fraction form
    20,750.88/28,636.10 = 11,319.42/x
  3. Step 3: Cross multiply
    20,750.88x = 28,636.10 × 11,319.42
  4. Step 4: Simplify right side
    20,750.88x = 324,144,043.06
  5. Step 5: Solve for x
    x = 324,144,043.06/20,750.88
  6. Step 6: Final answer
    x = 15,620.74

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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.