Home / 20,891.25-28,829.93-11,459.84

Finding the Fourth Proportional to 20,891.25, 28,829.93 and 11,459.84

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Solution

The fourth proportional to 20,891.25, 28,829.93 and 11,459.84 is: 15,814.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.25 : 28,829.93 = 11,459.84 : x
  2. Step 2: Convert to fraction form
    20,891.25/28,829.93 = 11,459.84/x
  3. Step 3: Cross multiply
    20,891.25x = 28,829.93 × 11,459.84
  4. Step 4: Simplify right side
    20,891.25x = 330,386,385.01
  5. Step 5: Solve for x
    x = 330,386,385.01/20,891.25
  6. Step 6: Final answer
    x = 15,814.58

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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.