Home / 5,121.79-7,068.74-2,884.10

Finding the Fourth Proportional to 5,121.79, 7,068.74 and 2,884.10

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Solution

The fourth proportional to 5,121.79, 7,068.74 and 2,884.10 is: 3,980.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.79 : 7,068.74 = 2,884.10 : x
  2. Step 2: Convert to fraction form
    5,121.79/7,068.74 = 2,884.10/x
  3. Step 3: Cross multiply
    5,121.79x = 7,068.74 × 2,884.10
  4. Step 4: Simplify right side
    5,121.79x = 20,386,903.27
  5. Step 5: Solve for x
    x = 20,386,903.27/5,121.79
  6. Step 6: Final answer
    x = 3,980.43

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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.