Home / 20,400.82-28,154.07-11,901.58

Finding the Fourth Proportional to 20,400.82, 28,154.07 and 11,901.58

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Solution

The fourth proportional to 20,400.82, 28,154.07 and 11,901.58 is: 16,424.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.82 : 28,154.07 = 11,901.58 : x
  2. Step 2: Convert to fraction form
    20,400.82/28,154.07 = 11,901.58/x
  3. Step 3: Cross multiply
    20,400.82x = 28,154.07 × 11,901.58
  4. Step 4: Simplify right side
    20,400.82x = 335,077,916.43
  5. Step 5: Solve for x
    x = 335,077,916.43/20,400.82
  6. Step 6: Final answer
    x = 16,424.73

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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.