Home / 13,409.04-20,087.40-8,778

Finding the Fourth Proportional to 13,409.04, 20,087.40 and 8,778

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Solution

The fourth proportional to 13,409.04, 20,087.40 and 8,778 is: 13,149.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,409.04 : 20,087.40 = 8,778 : x
  2. Step 2: Convert to fraction form
    13,409.04/20,087.40 = 8,778/x
  3. Step 3: Cross multiply
    13,409.04x = 20,087.40 × 8,778
  4. Step 4: Simplify right side
    13,409.04x = 176,327,197.20
  5. Step 5: Solve for x
    x = 176,327,197.20/13,409.04
  6. Step 6: Final answer
    x = 13,149.87

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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.