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Finding the Fourth Proportional to 12,958.79, 17,866.78 and 8,475.44

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Solution

The fourth proportional to 12,958.79, 17,866.78 and 8,475.44 is: 11,685.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,958.79 : 17,866.78 = 8,475.44 : x
  2. Step 2: Convert to fraction form
    12,958.79/17,866.78 = 8,475.44/x
  3. Step 3: Cross multiply
    12,958.79x = 17,866.78 × 8,475.44
  4. Step 4: Simplify right side
    12,958.79x = 151,428,690.17
  5. Step 5: Solve for x
    x = 151,428,690.17/12,958.79
  6. Step 6: Final answer
    x = 11,685.41

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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.