Home / 13,128.44-19,673.20-7,866.28

Finding the Fourth Proportional to 13,128.44, 19,673.20 and 7,866.28

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Solution

The fourth proportional to 13,128.44, 19,673.20 and 7,866.28 is: 11,787.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.44 : 19,673.20 = 7,866.28 : x
  2. Step 2: Convert to fraction form
    13,128.44/19,673.20 = 7,866.28/x
  3. Step 3: Cross multiply
    13,128.44x = 19,673.20 × 7,866.28
  4. Step 4: Simplify right side
    13,128.44x = 154,754,899.70
  5. Step 5: Solve for x
    x = 154,754,899.70/13,128.44
  6. Step 6: Final answer
    x = 11,787.76

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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.