Home / 8,720.55-13,078.85-2,480.42

Finding the Fourth Proportional to 8,720.55, 13,078.85 and 2,480.42

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Solution

The fourth proportional to 8,720.55, 13,078.85 and 2,480.42 is: 3,720.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.55 : 13,078.85 = 2,480.42 : x
  2. Step 2: Convert to fraction form
    8,720.55/13,078.85 = 2,480.42/x
  3. Step 3: Cross multiply
    8,720.55x = 13,078.85 × 2,480.42
  4. Step 4: Simplify right side
    8,720.55x = 32,441,061.41
  5. Step 5: Solve for x
    x = 32,441,061.41/8,720.55
  6. Step 6: Final answer
    x = 3,720.07

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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.