Home / 12,087.86-18,128.49-3,320.69

Finding the Fourth Proportional to 12,087.86, 18,128.49 and 3,320.69

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Solution

The fourth proportional to 12,087.86, 18,128.49 and 3,320.69 is: 4,980.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087.86 : 18,128.49 = 3,320.69 : x
  2. Step 2: Convert to fraction form
    12,087.86/18,128.49 = 3,320.69/x
  3. Step 3: Cross multiply
    12,087.86x = 18,128.49 × 3,320.69
  4. Step 4: Simplify right side
    12,087.86x = 60,199,095.46
  5. Step 5: Solve for x
    x = 60,199,095.46/12,087.86
  6. Step 6: Final answer
    x = 4,980.13

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.