Home / 20,310.58-28,026.69-11,357.78

Finding the Fourth Proportional to 20,310.58, 28,026.69 and 11,357.78

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Solution

The fourth proportional to 20,310.58, 28,026.69 and 11,357.78 is: 15,672.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.58 : 28,026.69 = 11,357.78 : x
  2. Step 2: Convert to fraction form
    20,310.58/28,026.69 = 11,357.78/x
  3. Step 3: Cross multiply
    20,310.58x = 28,026.69 × 11,357.78
  4. Step 4: Simplify right side
    20,310.58x = 318,320,979.15
  5. Step 5: Solve for x
    x = 318,320,979.15/20,310.58
  6. Step 6: Final answer
    x = 15,672.67

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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.