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Finding the Fourth Proportional to 18,129.40, 25,044.06 and 13,990.84

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Solution

The fourth proportional to 18,129.40, 25,044.06 and 13,990.84 is: 19,327.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.40 : 25,044.06 = 13,990.84 : x
  2. Step 2: Convert to fraction form
    18,129.40/25,044.06 = 13,990.84/x
  3. Step 3: Cross multiply
    18,129.40x = 25,044.06 × 13,990.84
  4. Step 4: Simplify right side
    18,129.40x = 350,387,436.41
  5. Step 5: Solve for x
    x = 350,387,436.41/18,129.40
  6. Step 6: Final answer
    x = 19,327.03

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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.