Home / 30,950.84-42,747.33-20,861.87

Finding the Fourth Proportional to 30,950.84, 42,747.33 and 20,861.87

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Solution

The fourth proportional to 30,950.84, 42,747.33 and 20,861.87 is: 28,813.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,950.84 : 42,747.33 = 20,861.87 : x
  2. Step 2: Convert to fraction form
    30,950.84/42,747.33 = 20,861.87/x
  3. Step 3: Cross multiply
    30,950.84x = 42,747.33 × 20,861.87
  4. Step 4: Simplify right side
    30,950.84x = 891,789,241.31
  5. Step 5: Solve for x
    x = 891,789,241.31/30,950.84
  6. Step 6: Final answer
    x = 28,813.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.