Home / 21,471.09-29,616.46-15,511.51

Finding the Fourth Proportional to 21,471.09, 29,616.46 and 15,511.51

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Solution

The fourth proportional to 21,471.09, 29,616.46 and 15,511.51 is: 21,396.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,471.09 : 29,616.46 = 15,511.51 : x
  2. Step 2: Convert to fraction form
    21,471.09/29,616.46 = 15,511.51/x
  3. Step 3: Cross multiply
    21,471.09x = 29,616.46 × 15,511.51
  4. Step 4: Simplify right side
    21,471.09x = 459,396,015.45
  5. Step 5: Solve for x
    x = 459,396,015.45/21,471.09
  6. Step 6: Final answer
    x = 21,396.03

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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.