Home / 19,986.20-29,990.10-8,894.60

Finding the Fourth Proportional to 19,986.20, 29,990.10 and 8,894.60

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Solution

The fourth proportional to 19,986.20, 29,990.10 and 8,894.60 is: 13,346.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986.20 : 29,990.10 = 8,894.60 : x
  2. Step 2: Convert to fraction form
    19,986.20/29,990.10 = 8,894.60/x
  3. Step 3: Cross multiply
    19,986.20x = 29,990.10 × 8,894.60
  4. Step 4: Simplify right side
    19,986.20x = 266,749,943.46
  5. Step 5: Solve for x
    x = 266,749,943.46/19,986.20
  6. Step 6: Final answer
    x = 13,346.71

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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.