Home / 20,871.28-28,802.04-11,310.94

Finding the Fourth Proportional to 20,871.28, 28,802.04 and 11,310.94

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Solution

The fourth proportional to 20,871.28, 28,802.04 and 11,310.94 is: 15,608.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.28 : 28,802.04 = 11,310.94 : x
  2. Step 2: Convert to fraction form
    20,871.28/28,802.04 = 11,310.94/x
  3. Step 3: Cross multiply
    20,871.28x = 28,802.04 × 11,310.94
  4. Step 4: Simplify right side
    20,871.28x = 325,778,146.32
  5. Step 5: Solve for x
    x = 325,778,146.32/20,871.28
  6. Step 6: Final answer
    x = 15,608.92

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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.