Home / 5,280.28-7,921.62-2,813.80

Finding the Fourth Proportional to 5,280.28, 7,921.62 and 2,813.80

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Solution

The fourth proportional to 5,280.28, 7,921.62 and 2,813.80 is: 4,221.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.28 : 7,921.62 = 2,813.80 : x
  2. Step 2: Convert to fraction form
    5,280.28/7,921.62 = 2,813.80/x
  3. Step 3: Cross multiply
    5,280.28x = 7,921.62 × 2,813.80
  4. Step 4: Simplify right side
    5,280.28x = 22,289,854.36
  5. Step 5: Solve for x
    x = 22,289,854.36/5,280.28
  6. Step 6: Final answer
    x = 4,221.34

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1.5x scale

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.