Home / 5,121.72-7,068.64-2,884.03

Finding the Fourth Proportional to 5,121.72, 7,068.64 and 2,884.03

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Solution

The fourth proportional to 5,121.72, 7,068.64 and 2,884.03 is: 3,980.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.72 : 7,068.64 = 2,884.03 : x
  2. Step 2: Convert to fraction form
    5,121.72/7,068.64 = 2,884.03/x
  3. Step 3: Cross multiply
    5,121.72x = 7,068.64 × 2,884.03
  4. Step 4: Simplify right side
    5,121.72x = 20,386,152.15
  5. Step 5: Solve for x
    x = 20,386,152.15/5,121.72
  6. Step 6: Final answer
    x = 3,980.34

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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.