Home / 31,377.08-43,276.38-21,313.28

Finding the Fourth Proportional to 31,377.08, 43,276.38 and 21,313.28

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Solution

The fourth proportional to 31,377.08, 43,276.38 and 21,313.28 is: 29,396.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,377.08 : 43,276.38 = 21,313.28 : x
  2. Step 2: Convert to fraction form
    31,377.08/43,276.38 = 21,313.28/x
  3. Step 3: Cross multiply
    31,377.08x = 43,276.38 × 21,313.28
  4. Step 4: Simplify right side
    31,377.08x = 922,361,604.33
  5. Step 5: Solve for x
    x = 922,361,604.33/31,377.08
  6. Step 6: Final answer
    x = 29,396.03

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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.