Home / 20,983.68-28,954.40-11,907.62

Finding the Fourth Proportional to 20,983.68, 28,954.40 and 11,907.62

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Solution

The fourth proportional to 20,983.68, 28,954.40 and 11,907.62 is: 16,430.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.68 : 28,954.40 = 11,907.62 : x
  2. Step 2: Convert to fraction form
    20,983.68/28,954.40 = 11,907.62/x
  3. Step 3: Cross multiply
    20,983.68x = 28,954.40 × 11,907.62
  4. Step 4: Simplify right side
    20,983.68x = 344,777,992.53
  5. Step 5: Solve for x
    x = 344,777,992.53/20,983.68
  6. Step 6: Final answer
    x = 16,430.77

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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.