Home / 31,620.64-43,657.68-19,688.80

Finding the Fourth Proportional to 31,620.64, 43,657.68 and 19,688.80

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Solution

The fourth proportional to 31,620.64, 43,657.68 and 19,688.80 is: 27,183.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,620.64 : 43,657.68 = 19,688.80 : x
  2. Step 2: Convert to fraction form
    31,620.64/43,657.68 = 19,688.80/x
  3. Step 3: Cross multiply
    31,620.64x = 43,657.68 × 19,688.80
  4. Step 4: Simplify right side
    31,620.64x = 859,567,329.98
  5. Step 5: Solve for x
    x = 859,567,329.98/31,620.64
  6. Step 6: Final answer
    x = 27,183.74

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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.