Home / 21,936.76-30,272.16-12,505.12

Finding the Fourth Proportional to 21,936.76, 30,272.16 and 12,505.12

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Solution

The fourth proportional to 21,936.76, 30,272.16 and 12,505.12 is: 17,256.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,936.76 : 30,272.16 = 12,505.12 : x
  2. Step 2: Convert to fraction form
    21,936.76/30,272.16 = 12,505.12/x
  3. Step 3: Cross multiply
    21,936.76x = 30,272.16 × 12,505.12
  4. Step 4: Simplify right side
    21,936.76x = 378,556,993.46
  5. Step 5: Solve for x
    x = 378,556,993.46/21,936.76
  6. Step 6: Final answer
    x = 17,256.74

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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.