Home / 12,985.18-19,480.20-5,194.60

Finding the Fourth Proportional to 12,985.18, 19,480.20 and 5,194.60

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Solution

The fourth proportional to 12,985.18, 19,480.20 and 5,194.60 is: 7,792.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.18 : 19,480.20 = 5,194.60 : x
  2. Step 2: Convert to fraction form
    12,985.18/19,480.20 = 5,194.60/x
  3. Step 3: Cross multiply
    12,985.18x = 19,480.20 × 5,194.60
  4. Step 4: Simplify right side
    12,985.18x = 101,191,778.74
  5. Step 5: Solve for x
    x = 101,191,778.74/12,985.18
  6. Step 6: Final answer
    x = 7,792.87

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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.