Home / 31,640.49-43,699.73-21,551.40

Finding the Fourth Proportional to 31,640.49, 43,699.73 and 21,551.40

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Solution

The fourth proportional to 31,640.49, 43,699.73 and 21,551.40 is: 29,765.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,640.49 : 43,699.73 = 21,551.40 : x
  2. Step 2: Convert to fraction form
    31,640.49/43,699.73 = 21,551.40/x
  3. Step 3: Cross multiply
    31,640.49x = 43,699.73 × 21,551.40
  4. Step 4: Simplify right side
    31,640.49x = 941,790,253.37
  5. Step 5: Solve for x
    x = 941,790,253.37/31,640.49
  6. Step 6: Final answer
    x = 29,765.35

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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.