Home / 12,188.05-18,283.70-5,615.71

Finding the Fourth Proportional to 12,188.05, 18,283.70 and 5,615.71

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Solution

The fourth proportional to 12,188.05, 18,283.70 and 5,615.71 is: 8,424.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,188.05 : 18,283.70 = 5,615.71 : x
  2. Step 2: Convert to fraction form
    12,188.05/18,283.70 = 5,615.71/x
  3. Step 3: Cross multiply
    12,188.05x = 18,283.70 × 5,615.71
  4. Step 4: Simplify right side
    12,188.05x = 102,675,928.85
  5. Step 5: Solve for x
    x = 102,675,928.85/12,188.05
  6. Step 6: Final answer
    x = 8,424.31

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1.5x scale

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.