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Finding the Fourth Proportional to 12,958.58, 17,885.36 and 8,426.87

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Solution

The fourth proportional to 12,958.58, 17,885.36 and 8,426.87 is: 11,630.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,958.58 : 17,885.36 = 8,426.87 : x
  2. Step 2: Convert to fraction form
    12,958.58/17,885.36 = 8,426.87/x
  3. Step 3: Cross multiply
    12,958.58x = 17,885.36 × 8,426.87
  4. Step 4: Simplify right side
    12,958.58x = 150,717,603.62
  5. Step 5: Solve for x
    x = 150,717,603.62/12,958.58
  6. Step 6: Final answer
    x = 11,630.72

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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.