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Finding the Fourth Proportional to 12,858.68, 17,739.06 and 8,885.36

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Solution

The fourth proportional to 12,858.68, 17,739.06 and 8,885.36 is: 12,257.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,858.68 : 17,739.06 = 8,885.36 : x
  2. Step 2: Convert to fraction form
    12,858.68/17,739.06 = 8,885.36/x
  3. Step 3: Cross multiply
    12,858.68x = 17,739.06 × 8,885.36
  4. Step 4: Simplify right side
    12,858.68x = 157,617,934.16
  5. Step 5: Solve for x
    x = 157,617,934.16/12,858.68
  6. Step 6: Final answer
    x = 12,257.71

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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.