Home / 5,172.40-7,137.89-2,814.58

Finding the Fourth Proportional to 5,172.40, 7,137.89 and 2,814.58

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Solution

The fourth proportional to 5,172.40, 7,137.89 and 2,814.58 is: 3,884.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.40 : 7,137.89 = 2,814.58 : x
  2. Step 2: Convert to fraction form
    5,172.40/7,137.89 = 2,814.58/x
  3. Step 3: Cross multiply
    5,172.40x = 7,137.89 × 2,814.58
  4. Step 4: Simplify right side
    5,172.40x = 20,090,130.52
  5. Step 5: Solve for x
    x = 20,090,130.52/5,172.40
  6. Step 6: Final answer
    x = 3,884.10

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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.