Home / 31,431.84-43,330.32-21,971.04

Finding the Fourth Proportional to 31,431.84, 43,330.32 and 21,971.04

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Solution

The fourth proportional to 31,431.84, 43,330.32 and 21,971.04 is: 30,288.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,431.84 : 43,330.32 = 21,971.04 : x
  2. Step 2: Convert to fraction form
    31,431.84/43,330.32 = 21,971.04/x
  3. Step 3: Cross multiply
    31,431.84x = 43,330.32 × 21,971.04
  4. Step 4: Simplify right side
    31,431.84x = 952,012,193.93
  5. Step 5: Solve for x
    x = 952,012,193.93/31,431.84
  6. Step 6: Final answer
    x = 30,288.15

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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.