Home / 20,930.76-28,886.24-11,501.28

Finding the Fourth Proportional to 20,930.76, 28,886.24 and 11,501.28

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Solution

The fourth proportional to 20,930.76, 28,886.24 and 11,501.28 is: 15,872.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.76 : 28,886.24 = 11,501.28 : x
  2. Step 2: Convert to fraction form
    20,930.76/28,886.24 = 11,501.28/x
  3. Step 3: Cross multiply
    20,930.76x = 28,886.24 × 11,501.28
  4. Step 4: Simplify right side
    20,930.76x = 332,228,734.39
  5. Step 5: Solve for x
    x = 332,228,734.39/20,930.76
  6. Step 6: Final answer
    x = 15,872.75

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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.