Home / 20,883.18-31,309.89-9,783.82

Finding the Fourth Proportional to 20,883.18, 31,309.89 and 9,783.82

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Solution

The fourth proportional to 20,883.18, 31,309.89 and 9,783.82 is: 14,668.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.18 : 31,309.89 = 9,783.82 : x
  2. Step 2: Convert to fraction form
    20,883.18/31,309.89 = 9,783.82/x
  3. Step 3: Cross multiply
    20,883.18x = 31,309.89 × 9,783.82
  4. Step 4: Simplify right side
    20,883.18x = 306,330,327.98
  5. Step 5: Solve for x
    x = 306,330,327.98/20,883.18
  6. Step 6: Final answer
    x = 14,668.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.