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Finding the Fourth Proportional to 12,487.16, 17,235.18 and 8,238.98

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Solution

The fourth proportional to 12,487.16, 17,235.18 and 8,238.98 is: 11,371.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.16 : 17,235.18 = 8,238.98 : x
  2. Step 2: Convert to fraction form
    12,487.16/17,235.18 = 8,238.98/x
  3. Step 3: Cross multiply
    12,487.16x = 17,235.18 × 8,238.98
  4. Step 4: Simplify right side
    12,487.16x = 142,000,346.40
  5. Step 5: Solve for x
    x = 142,000,346.40/12,487.16
  6. Step 6: Final answer
    x = 11,371.71

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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.