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Finding the Fourth Proportional to 18,674.40, 25,759.44 and 14,689.20

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Solution

The fourth proportional to 18,674.40, 25,759.44 and 14,689.20 is: 20,262.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,674.40 : 25,759.44 = 14,689.20 : x
  2. Step 2: Convert to fraction form
    18,674.40/25,759.44 = 14,689.20/x
  3. Step 3: Cross multiply
    18,674.40x = 25,759.44 × 14,689.20
  4. Step 4: Simplify right side
    18,674.40x = 378,385,566.05
  5. Step 5: Solve for x
    x = 378,385,566.05/18,674.40
  6. Step 6: Final answer
    x = 20,262.26

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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.