Home / 39,621.90-54,677.89-21,716.86

Finding the Fourth Proportional to 39,621.90, 54,677.89 and 21,716.86

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Solution

The fourth proportional to 39,621.90, 54,677.89 and 21,716.86 is: 29,969.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,621.90 : 54,677.89 = 21,716.86 : x
  2. Step 2: Convert to fraction form
    39,621.90/54,677.89 = 21,716.86/x
  3. Step 3: Cross multiply
    39,621.90x = 54,677.89 × 21,716.86
  4. Step 4: Simplify right side
    39,621.90x = 1,187,432,082.23
  5. Step 5: Solve for x
    x = 1,187,432,082.23/39,621.90
  6. Step 6: Final answer
    x = 29,969.09

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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.