Home / 20,961.78-28,926.61-11,530.32

Finding the Fourth Proportional to 20,961.78, 28,926.61 and 11,530.32

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Solution

The fourth proportional to 20,961.78, 28,926.61 and 11,530.32 is: 15,911.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.78 : 28,926.61 = 11,530.32 : x
  2. Step 2: Convert to fraction form
    20,961.78/28,926.61 = 11,530.32/x
  3. Step 3: Cross multiply
    20,961.78x = 28,926.61 × 11,530.32
  4. Step 4: Simplify right side
    20,961.78x = 333,533,069.82
  5. Step 5: Solve for x
    x = 333,533,069.82/20,961.78
  6. Step 6: Final answer
    x = 15,911.49

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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.