Home / 5,280.36-7,290.72-3,515.64

Finding the Fourth Proportional to 5,280.36, 7,290.72 and 3,515.64

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Solution

The fourth proportional to 5,280.36, 7,290.72 and 3,515.64 is: 4,854.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.36 : 7,290.72 = 3,515.64 : x
  2. Step 2: Convert to fraction form
    5,280.36/7,290.72 = 3,515.64/x
  3. Step 3: Cross multiply
    5,280.36x = 7,290.72 × 3,515.64
  4. Step 4: Simplify right side
    5,280.36x = 25,631,546.86
  5. Step 5: Solve for x
    x = 25,631,546.86/5,280.36
  6. Step 6: Final answer
    x = 4,854.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.