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Finding the Fourth Proportional to 18,676.64, 25,810.92 and 15,314.24

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Solution

The fourth proportional to 18,676.64, 25,810.92 and 15,314.24 is: 21,164.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,676.64 : 25,810.92 = 15,314.24 : x
  2. Step 2: Convert to fraction form
    18,676.64/25,810.92 = 15,314.24/x
  3. Step 3: Cross multiply
    18,676.64x = 25,810.92 × 15,314.24
  4. Step 4: Simplify right side
    18,676.64x = 395,274,623.50
  5. Step 5: Solve for x
    x = 395,274,623.50/18,676.64
  6. Step 6: Final answer
    x = 21,164.12

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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.