Home / 20,716.80-31,075.18-5,134.43

Finding the Fourth Proportional to 20,716.80, 31,075.18 and 5,134.43

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Solution

The fourth proportional to 20,716.80, 31,075.18 and 5,134.43 is: 7,701.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.80 : 31,075.18 = 5,134.43 : x
  2. Step 2: Convert to fraction form
    20,716.80/31,075.18 = 5,134.43/x
  3. Step 3: Cross multiply
    20,716.80x = 31,075.18 × 5,134.43
  4. Step 4: Simplify right side
    20,716.80x = 159,553,155.40
  5. Step 5: Solve for x
    x = 159,553,155.40/20,716.80
  6. Step 6: Final answer
    x = 7,701.63

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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.