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Finding the Fourth Proportional to 3,720.84, 5,129.16 and 2,835.12

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Solution

The fourth proportional to 3,720.84, 5,129.16 and 2,835.12 is: 3,908.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.84 : 5,129.16 = 2,835.12 : x
  2. Step 2: Convert to fraction form
    3,720.84/5,129.16 = 2,835.12/x
  3. Step 3: Cross multiply
    3,720.84x = 5,129.16 × 2,835.12
  4. Step 4: Simplify right side
    3,720.84x = 14,541,784.10
  5. Step 5: Solve for x
    x = 14,541,784.10/3,720.84
  6. Step 6: Final answer
    x = 3,908.20

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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.