Home / 13,678.50-18,876.35-7,390.88

Finding the Fourth Proportional to 13,678.50, 18,876.35 and 7,390.88

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Solution

The fourth proportional to 13,678.50, 18,876.35 and 7,390.88 is: 10,199.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.50 : 18,876.35 = 7,390.88 : x
  2. Step 2: Convert to fraction form
    13,678.50/18,876.35 = 7,390.88/x
  3. Step 3: Cross multiply
    13,678.50x = 18,876.35 × 7,390.88
  4. Step 4: Simplify right side
    13,678.50x = 139,512,706.35
  5. Step 5: Solve for x
    x = 139,512,706.35/13,678.50
  6. Step 6: Final answer
    x = 10,199.42

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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.