Home / 13,436.39-19,985.42-13,391.43

Finding the Fourth Proportional to 13,436.39, 19,985.42 and 13,391.43

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Solution

The fourth proportional to 13,436.39, 19,985.42 and 13,391.43 is: 19,918.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,436.39 : 19,985.42 = 13,391.43 : x
  2. Step 2: Convert to fraction form
    13,436.39/19,985.42 = 13,391.43/x
  3. Step 3: Cross multiply
    13,436.39x = 19,985.42 × 13,391.43
  4. Step 4: Simplify right side
    13,436.39x = 267,633,319.47
  5. Step 5: Solve for x
    x = 267,633,319.47/13,436.39
  6. Step 6: Final answer
    x = 19,918.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.