Home / 21,761.20-30,007.65-16,107.81

Finding the Fourth Proportional to 21,761.20, 30,007.65 and 16,107.81

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Solution

The fourth proportional to 21,761.20, 30,007.65 and 16,107.81 is: 22,211.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,761.20 : 30,007.65 = 16,107.81 : x
  2. Step 2: Convert to fraction form
    21,761.20/30,007.65 = 16,107.81/x
  3. Step 3: Cross multiply
    21,761.20x = 30,007.65 × 16,107.81
  4. Step 4: Simplify right side
    21,761.20x = 483,357,524.75
  5. Step 5: Solve for x
    x = 483,357,524.75/21,761.20
  6. Step 6: Final answer
    x = 22,211.90

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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.