Home / 20,930.66-28,885.73-11,499.32

Finding the Fourth Proportional to 20,930.66, 28,885.73 and 11,499.32

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Solution

The fourth proportional to 20,930.66, 28,885.73 and 11,499.32 is: 15,869.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.66 : 28,885.73 = 11,499.32 : x
  2. Step 2: Convert to fraction form
    20,930.66/28,885.73 = 11,499.32/x
  3. Step 3: Cross multiply
    20,930.66x = 28,885.73 × 11,499.32
  4. Step 4: Simplify right side
    20,930.66x = 332,166,050.78
  5. Step 5: Solve for x
    x = 332,166,050.78/20,930.66
  6. Step 6: Final answer
    x = 15,869.84

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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.