Home / 5,172.63-7,138.28-2,814.76

Finding the Fourth Proportional to 5,172.63, 7,138.28 and 2,814.76

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Solution

The fourth proportional to 5,172.63, 7,138.28 and 2,814.76 is: 3,884.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.63 : 7,138.28 = 2,814.76 : x
  2. Step 2: Convert to fraction form
    5,172.63/7,138.28 = 2,814.76/x
  3. Step 3: Cross multiply
    5,172.63x = 7,138.28 × 2,814.76
  4. Step 4: Simplify right side
    5,172.63x = 20,092,545.01
  5. Step 5: Solve for x
    x = 20,092,545.01/5,172.63
  6. Step 6: Final answer
    x = 3,884.40

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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.