Home / 21,022.78-29,012.70-11,591.32

Finding the Fourth Proportional to 21,022.78, 29,012.70 and 11,591.32

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Solution

The fourth proportional to 21,022.78, 29,012.70 and 11,591.32 is: 15,996.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.78 : 29,012.70 = 11,591.32 : x
  2. Step 2: Convert to fraction form
    21,022.78/29,012.70 = 11,591.32/x
  3. Step 3: Cross multiply
    21,022.78x = 29,012.70 × 11,591.32
  4. Step 4: Simplify right side
    21,022.78x = 336,295,489.76
  5. Step 5: Solve for x
    x = 336,295,489.76/21,022.78
  6. Step 6: Final answer
    x = 15,996.72

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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.