Home / 13,887.12-19,163.75-7,920.71

Finding the Fourth Proportional to 13,887.12, 19,163.75 and 7,920.71

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Solution

The fourth proportional to 13,887.12, 19,163.75 and 7,920.71 is: 10,930.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,887.12 : 19,163.75 = 7,920.71 : x
  2. Step 2: Convert to fraction form
    13,887.12/19,163.75 = 7,920.71/x
  3. Step 3: Cross multiply
    13,887.12x = 19,163.75 × 7,920.71
  4. Step 4: Simplify right side
    13,887.12x = 151,790,506.26
  5. Step 5: Solve for x
    x = 151,790,506.26/13,887.12
  6. Step 6: Final answer
    x = 10,930.31

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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.