Home / 8,720.59-13,085.63-3,790.21

Finding the Fourth Proportional to 8,720.59, 13,085.63 and 3,790.21

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Solution

The fourth proportional to 8,720.59, 13,085.63 and 3,790.21 is: 5,687.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.59 : 13,085.63 = 3,790.21 : x
  2. Step 2: Convert to fraction form
    8,720.59/13,085.63 = 3,790.21/x
  3. Step 3: Cross multiply
    8,720.59x = 13,085.63 × 3,790.21
  4. Step 4: Simplify right side
    8,720.59x = 49,597,201.30
  5. Step 5: Solve for x
    x = 49,597,201.30/8,720.59
  6. Step 6: Final answer
    x = 5,687.37

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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.