Home / 21,659.40-29,665.66-20,382.51

Finding the Fourth Proportional to 21,659.40, 29,665.66 and 20,382.51

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Solution

The fourth proportional to 21,659.40, 29,665.66 and 20,382.51 is: 27,916.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,659.40 : 29,665.66 = 20,382.51 : x
  2. Step 2: Convert to fraction form
    21,659.40/29,665.66 = 20,382.51/x
  3. Step 3: Cross multiply
    21,659.40x = 29,665.66 × 20,382.51
  4. Step 4: Simplify right side
    21,659.40x = 604,660,540.69
  5. Step 5: Solve for x
    x = 604,660,540.69/21,659.40
  6. Step 6: Final answer
    x = 27,916.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.