Home / 13,419.76-18,530.32-8,712.08

Finding the Fourth Proportional to 13,419.76, 18,530.32 and 8,712.08

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Solution

The fourth proportional to 13,419.76, 18,530.32 and 8,712.08 is: 12,029.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,419.76 : 18,530.32 = 8,712.08 : x
  2. Step 2: Convert to fraction form
    13,419.76/18,530.32 = 8,712.08/x
  3. Step 3: Cross multiply
    13,419.76x = 18,530.32 × 8,712.08
  4. Step 4: Simplify right side
    13,419.76x = 161,437,630.27
  5. Step 5: Solve for x
    x = 161,437,630.27/13,419.76
  6. Step 6: Final answer
    x = 12,029.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.