Home / 20,513.68-30,767.79-5,721.36

Finding the Fourth Proportional to 20,513.68, 30,767.79 and 5,721.36

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Solution

The fourth proportional to 20,513.68, 30,767.79 and 5,721.36 is: 8,581.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.68 : 30,767.79 = 5,721.36 : x
  2. Step 2: Convert to fraction form
    20,513.68/30,767.79 = 5,721.36/x
  3. Step 3: Cross multiply
    20,513.68x = 30,767.79 × 5,721.36
  4. Step 4: Simplify right side
    20,513.68x = 176,033,574.39
  5. Step 5: Solve for x
    x = 176,033,574.39/20,513.68
  6. Step 6: Final answer
    x = 8,581.28

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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.