Home / 20,765.81-31,097.82-18,768.89

Finding the Fourth Proportional to 20,765.81, 31,097.82 and 18,768.89

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Solution

The fourth proportional to 20,765.81, 31,097.82 and 18,768.89 is: 28,107.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.81 : 31,097.82 = 18,768.89 : x
  2. Step 2: Convert to fraction form
    20,765.81/31,097.82 = 18,768.89/x
  3. Step 3: Cross multiply
    20,765.81x = 31,097.82 × 18,768.89
  4. Step 4: Simplify right side
    20,765.81x = 583,671,710.95
  5. Step 5: Solve for x
    x = 583,671,710.95/20,765.81
  6. Step 6: Final answer
    x = 28,107.34

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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.