Home / 20,961.91-28,926.83-11,530.47

Finding the Fourth Proportional to 20,961.91, 28,926.83 and 11,530.47

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Solution

The fourth proportional to 20,961.91, 28,926.83 and 11,530.47 is: 15,911.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.91 : 28,926.83 = 11,530.47 : x
  2. Step 2: Convert to fraction form
    20,961.91/28,926.83 = 11,530.47/x
  3. Step 3: Cross multiply
    20,961.91x = 28,926.83 × 11,530.47
  4. Step 4: Simplify right side
    20,961.91x = 333,539,988.88
  5. Step 5: Solve for x
    x = 333,539,988.88/20,961.91
  6. Step 6: Final answer
    x = 15,911.72

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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.