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Finding the Fourth Proportional to 18,343.60, 25,315.44 and 13,859.44

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Solution

The fourth proportional to 18,343.60, 25,315.44 and 13,859.44 is: 19,126.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,343.60 : 25,315.44 = 13,859.44 : x
  2. Step 2: Convert to fraction form
    18,343.60/25,315.44 = 13,859.44/x
  3. Step 3: Cross multiply
    18,343.60x = 25,315.44 × 13,859.44
  4. Step 4: Simplify right side
    18,343.60x = 350,857,821.75
  5. Step 5: Solve for x
    x = 350,857,821.75/18,343.60
  6. Step 6: Final answer
    x = 19,126.99

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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.