Home / 39,638.28-54,699.46-21,732.84

Finding the Fourth Proportional to 39,638.28, 54,699.46 and 21,732.84

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Solution

The fourth proportional to 39,638.28, 54,699.46 and 21,732.84 is: 29,990.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,638.28 : 54,699.46 = 21,732.84 : x
  2. Step 2: Convert to fraction form
    39,638.28/54,699.46 = 21,732.84/x
  3. Step 3: Cross multiply
    39,638.28x = 54,699.46 × 21,732.84
  4. Step 4: Simplify right side
    39,638.28x = 1,188,774,612.27
  5. Step 5: Solve for x
    x = 1,188,774,612.27/39,638.28
  6. Step 6: Final answer
    x = 29,990.57

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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.