Home / 12,918.64-19,376.88-5,125.36

Finding the Fourth Proportional to 12,918.64, 19,376.88 and 5,125.36

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Solution

The fourth proportional to 12,918.64, 19,376.88 and 5,125.36 is: 7,687.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.64 : 19,376.88 = 5,125.36 : x
  2. Step 2: Convert to fraction form
    12,918.64/19,376.88 = 5,125.36/x
  3. Step 3: Cross multiply
    12,918.64x = 19,376.88 × 5,125.36
  4. Step 4: Simplify right side
    12,918.64x = 99,313,485.68
  5. Step 5: Solve for x
    x = 99,313,485.68/12,918.64
  6. Step 6: Final answer
    x = 7,687.61

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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.