Home / 13,512.39-18,643.81-7,922.31

Finding the Fourth Proportional to 13,512.39, 18,643.81 and 7,922.31

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Solution

The fourth proportional to 13,512.39, 18,643.81 and 7,922.31 is: 10,930.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,512.39 : 18,643.81 = 7,922.31 : x
  2. Step 2: Convert to fraction form
    13,512.39/18,643.81 = 7,922.31/x
  3. Step 3: Cross multiply
    13,512.39x = 18,643.81 × 7,922.31
  4. Step 4: Simplify right side
    13,512.39x = 147,702,042.40
  5. Step 5: Solve for x
    x = 147,702,042.40/13,512.39
  6. Step 6: Final answer
    x = 10,930.86

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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.