Home / 18,989.98-26,171.37-12,605.29

Finding the Fourth Proportional to 18,989.98, 26,171.37 and 12,605.29

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Solution

The fourth proportional to 18,989.98, 26,171.37 and 12,605.29 is: 17,372.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.98 : 26,171.37 = 12,605.29 : x
  2. Step 2: Convert to fraction form
    18,989.98/26,171.37 = 12,605.29/x
  3. Step 3: Cross multiply
    18,989.98x = 26,171.37 × 12,605.29
  4. Step 4: Simplify right side
    18,989.98x = 329,897,708.55
  5. Step 5: Solve for x
    x = 329,897,708.55/18,989.98
  6. Step 6: Final answer
    x = 17,372.20

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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.