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Finding the Fourth Proportional to 39,992.40, 59,972.40 and 13,683.60

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Solution

The fourth proportional to 39,992.40, 59,972.40 and 13,683.60 is: 20,519.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,992.40 : 59,972.40 = 13,683.60 : x
  2. Step 2: Convert to fraction form
    39,992.40/59,972.40 = 13,683.60/x
  3. Step 3: Cross multiply
    39,992.40x = 59,972.40 × 13,683.60
  4. Step 4: Simplify right side
    39,992.40x = 820,638,332.64
  5. Step 5: Solve for x
    x = 820,638,332.64/39,992.40
  6. Step 6: Final answer
    x = 20,519.86

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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.