Home / 19,911.40-29,867.10-8,218.60

Finding the Fourth Proportional to 19,911.40, 29,867.10 and 8,218.60

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Solution

The fourth proportional to 19,911.40, 29,867.10 and 8,218.60 is: 12,327.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,911.40 : 29,867.10 = 8,218.60 : x
  2. Step 2: Convert to fraction form
    19,911.40/29,867.10 = 8,218.60/x
  3. Step 3: Cross multiply
    19,911.40x = 29,867.10 × 8,218.60
  4. Step 4: Simplify right side
    19,911.40x = 245,465,748.06
  5. Step 5: Solve for x
    x = 245,465,748.06/19,911.40
  6. Step 6: Final answer
    x = 12,327.90

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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.