Home / 3,678.10-5,069.88-2,880.08

Finding the Fourth Proportional to 3,678.10, 5,069.88 and 2,880.08

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Solution

The fourth proportional to 3,678.10, 5,069.88 and 2,880.08 is: 3,969.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.10 : 5,069.88 = 2,880.08 : x
  2. Step 2: Convert to fraction form
    3,678.10/5,069.88 = 2,880.08/x
  3. Step 3: Cross multiply
    3,678.10x = 5,069.88 × 2,880.08
  4. Step 4: Simplify right side
    3,678.10x = 14,601,659.99
  5. Step 5: Solve for x
    x = 14,601,659.99/3,678.10
  6. Step 6: Final answer
    x = 3,969.89

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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.