Home / 20,716.80-31,075.20-19,951.35

Finding the Fourth Proportional to 20,716.80, 31,075.20 and 19,951.35

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Solution

The fourth proportional to 20,716.80, 31,075.20 and 19,951.35 is: 29,927.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.80 : 31,075.20 = 19,951.35 : x
  2. Step 2: Convert to fraction form
    20,716.80/31,075.20 = 19,951.35/x
  3. Step 3: Cross multiply
    20,716.80x = 31,075.20 × 19,951.35
  4. Step 4: Simplify right side
    20,716.80x = 619,992,191.52
  5. Step 5: Solve for x
    x = 619,992,191.52/20,716.80
  6. Step 6: Final answer
    x = 29,927.03

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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.