Home / 13,731.32-18,947.82-8,426.36

Finding the Fourth Proportional to 13,731.32, 18,947.82 and 8,426.36

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Solution

The fourth proportional to 13,731.32, 18,947.82 and 8,426.36 is: 11,627.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.32 : 18,947.82 = 8,426.36 : x
  2. Step 2: Convert to fraction form
    13,731.32/18,947.82 = 8,426.36/x
  3. Step 3: Cross multiply
    13,731.32x = 18,947.82 × 8,426.36
  4. Step 4: Simplify right side
    13,731.32x = 159,661,152.54
  5. Step 5: Solve for x
    x = 159,661,152.54/13,731.32
  6. Step 6: Final answer
    x = 11,627.52

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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.