Home / 39,905.20-59,865.90-13,612.60

Finding the Fourth Proportional to 39,905.20, 59,865.90 and 13,612.60

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Solution

The fourth proportional to 39,905.20, 59,865.90 and 13,612.60 is: 20,421.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,905.20 : 59,865.90 = 13,612.60 : x
  2. Step 2: Convert to fraction form
    39,905.20/59,865.90 = 13,612.60/x
  3. Step 3: Cross multiply
    39,905.20x = 59,865.90 × 13,612.60
  4. Step 4: Simplify right side
    39,905.20x = 814,930,550.34
  5. Step 5: Solve for x
    x = 814,930,550.34/39,905.20
  6. Step 6: Final answer
    x = 20,421.66

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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.