Home / 31,518.68-43,491.83-21,331.98

Finding the Fourth Proportional to 31,518.68, 43,491.83 and 21,331.98

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Solution

The fourth proportional to 31,518.68, 43,491.83 and 21,331.98 is: 29,435.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,518.68 : 43,491.83 = 21,331.98 : x
  2. Step 2: Convert to fraction form
    31,518.68/43,491.83 = 21,331.98/x
  3. Step 3: Cross multiply
    31,518.68x = 43,491.83 × 21,331.98
  4. Step 4: Simplify right side
    31,518.68x = 927,766,741.06
  5. Step 5: Solve for x
    x = 927,766,741.06/31,518.68
  6. Step 6: Final answer
    x = 29,435.46

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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.