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Finding the Fourth Proportional to 8,720.87, 12,040.35 and 5,741.84

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Solution

The fourth proportional to 8,720.87, 12,040.35 and 5,741.84 is: 7,927.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.87 : 12,040.35 = 5,741.84 : x
  2. Step 2: Convert to fraction form
    8,720.87/12,040.35 = 5,741.84/x
  3. Step 3: Cross multiply
    8,720.87x = 12,040.35 × 5,741.84
  4. Step 4: Simplify right side
    8,720.87x = 69,133,704.09
  5. Step 5: Solve for x
    x = 69,133,704.09/8,720.87
  6. Step 6: Final answer
    x = 7,927.39

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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.