Home / 12,390.12-18,582.54-4,071.12

Finding the Fourth Proportional to 12,390.12, 18,582.54 and 4,071.12

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Solution

The fourth proportional to 12,390.12, 18,582.54 and 4,071.12 is: 6,105.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.12 : 18,582.54 = 4,071.12 : x
  2. Step 2: Convert to fraction form
    12,390.12/18,582.54 = 4,071.12/x
  3. Step 3: Cross multiply
    12,390.12x = 18,582.54 × 4,071.12
  4. Step 4: Simplify right side
    12,390.12x = 75,651,750.24
  5. Step 5: Solve for x
    x = 75,651,750.24/12,390.12
  6. Step 6: Final answer
    x = 6,105.81

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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.