Home / 20,965.76-31,449.76-5,383.52

Finding the Fourth Proportional to 20,965.76, 31,449.76 and 5,383.52

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Solution

The fourth proportional to 20,965.76, 31,449.76 and 5,383.52 is: 8,075.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.76 : 31,449.76 = 5,383.52 : x
  2. Step 2: Convert to fraction form
    20,965.76/31,449.76 = 5,383.52/x
  3. Step 3: Cross multiply
    20,965.76x = 31,449.76 × 5,383.52
  4. Step 4: Simplify right side
    20,965.76x = 169,310,411.96
  5. Step 5: Solve for x
    x = 169,310,411.96/20,965.76
  6. Step 6: Final answer
    x = 8,075.57

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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.