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Finding the Fourth Proportional to 12,765.90, 17,619.05 and 7,459.69

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Solution

The fourth proportional to 12,765.90, 17,619.05 and 7,459.69 is: 10,295.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,765.90 : 17,619.05 = 7,459.69 : x
  2. Step 2: Convert to fraction form
    12,765.90/17,619.05 = 7,459.69/x
  3. Step 3: Cross multiply
    12,765.90x = 17,619.05 × 7,459.69
  4. Step 4: Simplify right side
    12,765.90x = 131,432,651.09
  5. Step 5: Solve for x
    x = 131,432,651.09/12,765.90
  6. Step 6: Final answer
    x = 10,295.61

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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.