Home / 7,988.16-11,980.58-2,143.38

Finding the Fourth Proportional to 7,988.16, 11,980.58 and 2,143.38

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Solution

The fourth proportional to 7,988.16, 11,980.58 and 2,143.38 is: 3,214.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,988.16 : 11,980.58 = 2,143.38 : x
  2. Step 2: Convert to fraction form
    7,988.16/11,980.58 = 2,143.38/x
  3. Step 3: Cross multiply
    7,988.16x = 11,980.58 × 2,143.38
  4. Step 4: Simplify right side
    7,988.16x = 25,678,881.02
  5. Step 5: Solve for x
    x = 25,678,881.02/7,988.16
  6. Step 6: Final answer
    x = 3,214.62

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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.