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Finding the Fourth Proportional to 12,958.78, 17,866.77 and 8,475.43

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Solution

The fourth proportional to 12,958.78, 17,866.77 and 8,475.43 is: 11,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,958.78 : 17,866.77 = 8,475.43 : x
  2. Step 2: Convert to fraction form
    12,958.78/17,866.77 = 8,475.43/x
  3. Step 3: Cross multiply
    12,958.78x = 17,866.77 × 8,475.43
  4. Step 4: Simplify right side
    12,958.78x = 151,428,558.46
  5. Step 5: Solve for x
    x = 151,428,558.46/12,958.78
  6. Step 6: Final answer
    x = 11,685.40

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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.