Home / 7,110.78-10,666.65-3,988.44

Finding the Fourth Proportional to 7,110.78, 10,666.65 and 3,988.44

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Solution

The fourth proportional to 7,110.78, 10,666.65 and 3,988.44 is: 5,982.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,110.78 : 10,666.65 = 3,988.44 : x
  2. Step 2: Convert to fraction form
    7,110.78/10,666.65 = 3,988.44/x
  3. Step 3: Cross multiply
    7,110.78x = 10,666.65 × 3,988.44
  4. Step 4: Simplify right side
    7,110.78x = 42,543,293.53
  5. Step 5: Solve for x
    x = 42,543,293.53/7,110.78
  6. Step 6: Final answer
    x = 5,982.93

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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.