Home / 13,186.09-19,784.15-8,515.02

Finding the Fourth Proportional to 13,186.09, 19,784.15 and 8,515.02

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Solution

The fourth proportional to 13,186.09, 19,784.15 and 8,515.02 is: 12,775.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.09 : 19,784.15 = 8,515.02 : x
  2. Step 2: Convert to fraction form
    13,186.09/19,784.15 = 8,515.02/x
  3. Step 3: Cross multiply
    13,186.09x = 19,784.15 × 8,515.02
  4. Step 4: Simplify right side
    13,186.09x = 168,462,496.48
  5. Step 5: Solve for x
    x = 168,462,496.48/13,186.09
  6. Step 6: Final answer
    x = 12,775.77

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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.