Home / 39,489-59,242.86-11,787.72

Finding the Fourth Proportional to 39,489, 59,242.86 and 11,787.72

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Solution

The fourth proportional to 39,489, 59,242.86 and 11,787.72 is: 17,684.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,489 : 59,242.86 = 11,787.72 : x
  2. Step 2: Convert to fraction form
    39,489/59,242.86 = 11,787.72/x
  3. Step 3: Cross multiply
    39,489x = 59,242.86 × 11,787.72
  4. Step 4: Simplify right side
    39,489x = 698,338,245.68
  5. Step 5: Solve for x
    x = 698,338,245.68/39,489
  6. Step 6: Final answer
    x = 17,684.37

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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.