Home / 39,840.05-59,760.04-12,138.05

Finding the Fourth Proportional to 39,840.05, 59,760.04 and 12,138.05

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Solution

The fourth proportional to 39,840.05, 59,760.04 and 12,138.05 is: 18,207.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,840.05 : 59,760.04 = 12,138.05 : x
  2. Step 2: Convert to fraction form
    39,840.05/59,760.04 = 12,138.05/x
  3. Step 3: Cross multiply
    39,840.05x = 59,760.04 × 12,138.05
  4. Step 4: Simplify right side
    39,840.05x = 725,370,353.52
  5. Step 5: Solve for x
    x = 725,370,353.52/39,840.05
  6. Step 6: Final answer
    x = 18,207.06

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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.