Home / 5,120.72-7,681.20-1,832.12

Finding the Fourth Proportional to 5,120.72, 7,681.20 and 1,832.12

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Solution

The fourth proportional to 5,120.72, 7,681.20 and 1,832.12 is: 2,748.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.72 : 7,681.20 = 1,832.12 : x
  2. Step 2: Convert to fraction form
    5,120.72/7,681.20 = 1,832.12/x
  3. Step 3: Cross multiply
    5,120.72x = 7,681.20 × 1,832.12
  4. Step 4: Simplify right side
    5,120.72x = 14,072,880.14
  5. Step 5: Solve for x
    x = 14,072,880.14/5,120.72
  6. Step 6: Final answer
    x = 2,748.22

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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.