Home / 21,302.41-29,391.87-13,538.38

Finding the Fourth Proportional to 21,302.41, 29,391.87 and 13,538.38

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Solution

The fourth proportional to 21,302.41, 29,391.87 and 13,538.38 is: 18,679.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,302.41 : 29,391.87 = 13,538.38 : x
  2. Step 2: Convert to fraction form
    21,302.41/29,391.87 = 13,538.38/x
  3. Step 3: Cross multiply
    21,302.41x = 29,391.87 × 13,538.38
  4. Step 4: Simplify right side
    21,302.41x = 397,918,436.82
  5. Step 5: Solve for x
    x = 397,918,436.82/21,302.41
  6. Step 6: Final answer
    x = 18,679.51

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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.