Home / 5,121.36-7,678.20-2,813.52

Finding the Fourth Proportional to 5,121.36, 7,678.20 and 2,813.52

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Solution

The fourth proportional to 5,121.36, 7,678.20 and 2,813.52 is: 4,218.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.36 : 7,678.20 = 2,813.52 : x
  2. Step 2: Convert to fraction form
    5,121.36/7,678.20 = 2,813.52/x
  3. Step 3: Cross multiply
    5,121.36x = 7,678.20 × 2,813.52
  4. Step 4: Simplify right side
    5,121.36x = 21,602,769.26
  5. Step 5: Solve for x
    x = 21,602,769.26/5,121.36
  6. Step 6: Final answer
    x = 4,218.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.