Home / 13,142.74-19,664.70-7,858.30

Finding the Fourth Proportional to 13,142.74, 19,664.70 and 7,858.30

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Solution

The fourth proportional to 13,142.74, 19,664.70 and 7,858.30 is: 11,757.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,142.74 : 19,664.70 = 7,858.30 : x
  2. Step 2: Convert to fraction form
    13,142.74/19,664.70 = 7,858.30/x
  3. Step 3: Cross multiply
    13,142.74x = 19,664.70 × 7,858.30
  4. Step 4: Simplify right side
    13,142.74x = 154,531,112.01
  5. Step 5: Solve for x
    x = 154,531,112.01/13,142.74
  6. Step 6: Final answer
    x = 11,757.91

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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.