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Finding the Fourth Proportional to 12,653.72, 18,987.06 and 6,815.96

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Solution

The fourth proportional to 12,653.72, 18,987.06 and 6,815.96 is: 10,227.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653.72 : 18,987.06 = 6,815.96 : x
  2. Step 2: Convert to fraction form
    12,653.72/18,987.06 = 6,815.96/x
  3. Step 3: Cross multiply
    12,653.72x = 18,987.06 × 6,815.96
  4. Step 4: Simplify right side
    12,653.72x = 129,415,041.48
  5. Step 5: Solve for x
    x = 129,415,041.48/12,653.72
  6. Step 6: Final answer
    x = 10,227.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.