Home / 12,628.92-17,421.30-9,639.57

Finding the Fourth Proportional to 12,628.92, 17,421.30 and 9,639.57

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Solution

The fourth proportional to 12,628.92, 17,421.30 and 9,639.57 is: 13,297.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,628.92 : 17,421.30 = 9,639.57 : x
  2. Step 2: Convert to fraction form
    12,628.92/17,421.30 = 9,639.57/x
  3. Step 3: Cross multiply
    12,628.92x = 17,421.30 × 9,639.57
  4. Step 4: Simplify right side
    12,628.92x = 167,933,840.84
  5. Step 5: Solve for x
    x = 167,933,840.84/12,628.92
  6. Step 6: Final answer
    x = 13,297.56

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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.