Home / 5,118.05-7,675.66-1,420.00

Finding the Fourth Proportional to 5,118.05, 7,675.66 and 1,420.00

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Solution

The fourth proportional to 5,118.05, 7,675.66 and 1,420.00 is: 2,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.05 : 7,675.66 = 1,420.00 : x
  2. Step 2: Convert to fraction form
    5,118.05/7,675.66 = 1,420.00/x
  3. Step 3: Cross multiply
    5,118.05x = 7,675.66 × 1,420.00
  4. Step 4: Simplify right side
    5,118.05x = 10,899,419.79
  5. Step 5: Solve for x
    x = 10,899,419.79/5,118.05
  6. Step 6: Final answer
    x = 2,129.60

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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.