Home / 20,371.94-28,114.90-11,990.06

Finding the Fourth Proportional to 20,371.94, 28,114.90 and 11,990.06

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Solution

The fourth proportional to 20,371.94, 28,114.90 and 11,990.06 is: 16,547.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.94 : 28,114.90 = 11,990.06 : x
  2. Step 2: Convert to fraction form
    20,371.94/28,114.90 = 11,990.06/x
  3. Step 3: Cross multiply
    20,371.94x = 28,114.90 × 11,990.06
  4. Step 4: Simplify right side
    20,371.94x = 337,099,207.66
  5. Step 5: Solve for x
    x = 337,099,207.66/20,371.94
  6. Step 6: Final answer
    x = 16,547.23

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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.