Home / 31,890.60-44,015.12-21,116.48

Finding the Fourth Proportional to 31,890.60, 44,015.12 and 21,116.48

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Solution

The fourth proportional to 31,890.60, 44,015.12 and 21,116.48 is: 29,144.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,890.60 : 44,015.12 = 21,116.48 : x
  2. Step 2: Convert to fraction form
    31,890.60/44,015.12 = 21,116.48/x
  3. Step 3: Cross multiply
    31,890.60x = 44,015.12 × 21,116.48
  4. Step 4: Simplify right side
    31,890.60x = 929,444,401.18
  5. Step 5: Solve for x
    x = 929,444,401.18/31,890.60
  6. Step 6: Final answer
    x = 29,144.78

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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.