Home / 21,936.96-30,264-13,538.88

Finding the Fourth Proportional to 21,936.96, 30,264 and 13,538.88

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Solution

The fourth proportional to 21,936.96, 30,264 and 13,538.88 is: 18,678.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,936.96 : 30,264 = 13,538.88 : x
  2. Step 2: Convert to fraction form
    21,936.96/30,264 = 13,538.88/x
  3. Step 3: Cross multiply
    21,936.96x = 30,264 × 13,538.88
  4. Step 4: Simplify right side
    21,936.96x = 409,740,664.32
  5. Step 5: Solve for x
    x = 409,740,664.32/21,936.96
  6. Step 6: Final answer
    x = 18,678.10

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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.