Home / 21,918.84-30,247.92-11,982.84

Finding the Fourth Proportional to 21,918.84, 30,247.92 and 11,982.84

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Solution

The fourth proportional to 21,918.84, 30,247.92 and 11,982.84 is: 16,536.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.84 : 30,247.92 = 11,982.84 : x
  2. Step 2: Convert to fraction form
    21,918.84/30,247.92 = 11,982.84/x
  3. Step 3: Cross multiply
    21,918.84x = 30,247.92 × 11,982.84
  4. Step 4: Simplify right side
    21,918.84x = 362,455,985.69
  5. Step 5: Solve for x
    x = 362,455,985.69/21,918.84
  6. Step 6: Final answer
    x = 16,536.28

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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.