Home / 21,100.38-29,117.34-11,538.37

Finding the Fourth Proportional to 21,100.38, 29,117.34 and 11,538.37

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Solution

The fourth proportional to 21,100.38, 29,117.34 and 11,538.37 is: 15,922.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.38 : 29,117.34 = 11,538.37 : x
  2. Step 2: Convert to fraction form
    21,100.38/29,117.34 = 11,538.37/x
  3. Step 3: Cross multiply
    21,100.38x = 29,117.34 × 11,538.37
  4. Step 4: Simplify right side
    21,100.38x = 335,966,496.75
  5. Step 5: Solve for x
    x = 335,966,496.75/21,100.38
  6. Step 6: Final answer
    x = 15,922.30

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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.