Home / 5,118.43-7,677.64-1,420.66

Finding the Fourth Proportional to 5,118.43, 7,677.64 and 1,420.66

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Solution

The fourth proportional to 5,118.43, 7,677.64 and 1,420.66 is: 2,130.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.43 : 7,677.64 = 1,420.66 : x
  2. Step 2: Convert to fraction form
    5,118.43/7,677.64 = 1,420.66/x
  3. Step 3: Cross multiply
    5,118.43x = 7,677.64 × 1,420.66
  4. Step 4: Simplify right side
    5,118.43x = 10,907,270.55
  5. Step 5: Solve for x
    x = 10,907,270.55/5,118.43
  6. Step 6: Final answer
    x = 2,130.98

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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.