Home / 12,435.76-17,162.99-7,129.56

Finding the Fourth Proportional to 12,435.76, 17,162.99 and 7,129.56

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Solution

The fourth proportional to 12,435.76, 17,162.99 and 7,129.56 is: 9,839.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,435.76 : 17,162.99 = 7,129.56 : x
  2. Step 2: Convert to fraction form
    12,435.76/17,162.99 = 7,129.56/x
  3. Step 3: Cross multiply
    12,435.76x = 17,162.99 × 7,129.56
  4. Step 4: Simplify right side
    12,435.76x = 122,364,566.98
  5. Step 5: Solve for x
    x = 122,364,566.98/12,435.76
  6. Step 6: Final answer
    x = 9,839.73

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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.