Home / 21,299.32-31,947.86-8,150.68

Finding the Fourth Proportional to 21,299.32, 31,947.86 and 8,150.68

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Solution

The fourth proportional to 21,299.32, 31,947.86 and 8,150.68 is: 12,225.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.32 : 31,947.86 = 8,150.68 : x
  2. Step 2: Convert to fraction form
    21,299.32/31,947.86 = 8,150.68/x
  3. Step 3: Cross multiply
    21,299.32x = 31,947.86 × 8,150.68
  4. Step 4: Simplify right side
    21,299.32x = 260,396,783.54
  5. Step 5: Solve for x
    x = 260,396,783.54/21,299.32
  6. Step 6: Final answer
    x = 12,225.59

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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.