Home / 20,860.56-28,788.48-11,428.92

Finding the Fourth Proportional to 20,860.56, 28,788.48 and 11,428.92

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Solution

The fourth proportional to 20,860.56, 28,788.48 and 11,428.92 is: 15,772.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.56 : 28,788.48 = 11,428.92 : x
  2. Step 2: Convert to fraction form
    20,860.56/28,788.48 = 11,428.92/x
  3. Step 3: Cross multiply
    20,860.56x = 28,788.48 × 11,428.92
  4. Step 4: Simplify right side
    20,860.56x = 329,021,234.84
  5. Step 5: Solve for x
    x = 329,021,234.84/20,860.56
  6. Step 6: Final answer
    x = 15,772.41

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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.