Home / 12,506.51-18,759.78-5,109.68

Finding the Fourth Proportional to 12,506.51, 18,759.78 and 5,109.68

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Solution

The fourth proportional to 12,506.51, 18,759.78 and 5,109.68 is: 7,664.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,506.51 : 18,759.78 = 5,109.68 : x
  2. Step 2: Convert to fraction form
    12,506.51/18,759.78 = 5,109.68/x
  3. Step 3: Cross multiply
    12,506.51x = 18,759.78 × 5,109.68
  4. Step 4: Simplify right side
    12,506.51x = 95,856,378.87
  5. Step 5: Solve for x
    x = 95,856,378.87/12,506.51
  6. Step 6: Final answer
    x = 7,664.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.