Home / 20,411.94-28,168.16-11,458.62

Finding the Fourth Proportional to 20,411.94, 28,168.16 and 11,458.62

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Solution

The fourth proportional to 20,411.94, 28,168.16 and 11,458.62 is: 15,812.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.94 : 28,168.16 = 11,458.62 : x
  2. Step 2: Convert to fraction form
    20,411.94/28,168.16 = 11,458.62/x
  3. Step 3: Cross multiply
    20,411.94x = 28,168.16 × 11,458.62
  4. Step 4: Simplify right side
    20,411.94x = 322,768,241.54
  5. Step 5: Solve for x
    x = 322,768,241.54/20,411.94
  6. Step 6: Final answer
    x = 15,812.72

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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.