Home / 5,280.80-7,921.36-1,818

Finding the Fourth Proportional to 5,280.80, 7,921.36 and 1,818

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Solution

The fourth proportional to 5,280.80, 7,921.36 and 1,818 is: 2,727.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.80 : 7,921.36 = 1,818 : x
  2. Step 2: Convert to fraction form
    5,280.80/7,921.36 = 1,818/x
  3. Step 3: Cross multiply
    5,280.80x = 7,921.36 × 1,818
  4. Step 4: Simplify right side
    5,280.80x = 14,401,032.48
  5. Step 5: Solve for x
    x = 14,401,032.48/5,280.80
  6. Step 6: Final answer
    x = 2,727.06

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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.