Home / 21,875.25-30,187.85-11,939.25

Finding the Fourth Proportional to 21,875.25, 30,187.85 and 11,939.25

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Solution

The fourth proportional to 21,875.25, 30,187.85 and 11,939.25 is: 16,476.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,875.25 : 30,187.85 = 11,939.25 : x
  2. Step 2: Convert to fraction form
    21,875.25/30,187.85 = 11,939.25/x
  3. Step 3: Cross multiply
    21,875.25x = 30,187.85 × 11,939.25
  4. Step 4: Simplify right side
    21,875.25x = 360,420,228.42
  5. Step 5: Solve for x
    x = 360,420,228.42/21,875.25
  6. Step 6: Final answer
    x = 16,476.17

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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.