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Finding the Fourth Proportional to 12,489.66, 17,235.72 and 6,900.66

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Solution

The fourth proportional to 12,489.66, 17,235.72 and 6,900.66 is: 9,522.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.66 : 17,235.72 = 6,900.66 : x
  2. Step 2: Convert to fraction form
    12,489.66/17,235.72 = 6,900.66/x
  3. Step 3: Cross multiply
    12,489.66x = 17,235.72 × 6,900.66
  4. Step 4: Simplify right side
    12,489.66x = 118,937,843.58
  5. Step 5: Solve for x
    x = 118,937,843.58/12,489.66
  6. Step 6: Final answer
    x = 9,522.90

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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.