Home / 31,108.85-42,912.88-21,554.33

Finding the Fourth Proportional to 31,108.85, 42,912.88 and 21,554.33

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Solution

The fourth proportional to 31,108.85, 42,912.88 and 21,554.33 is: 29,732.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.85 : 42,912.88 = 21,554.33 : x
  2. Step 2: Convert to fraction form
    31,108.85/42,912.88 = 21,554.33/x
  3. Step 3: Cross multiply
    31,108.85x = 42,912.88 × 21,554.33
  4. Step 4: Simplify right side
    31,108.85x = 924,958,376.77
  5. Step 5: Solve for x
    x = 924,958,376.77/31,108.85
  6. Step 6: Final answer
    x = 29,732.97

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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.