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Finding the Fourth Proportional to 18,676.60, 25,776.30 and 10,721.32

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Solution

The fourth proportional to 18,676.60, 25,776.30 and 10,721.32 is: 14,796.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,676.60 : 25,776.30 = 10,721.32 : x
  2. Step 2: Convert to fraction form
    18,676.60/25,776.30 = 10,721.32/x
  3. Step 3: Cross multiply
    18,676.60x = 25,776.30 × 10,721.32
  4. Step 4: Simplify right side
    18,676.60x = 276,355,960.72
  5. Step 5: Solve for x
    x = 276,355,960.72/18,676.60
  6. Step 6: Final answer
    x = 14,796.91

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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.