Home / 20,678.68-28,536.66-11,247.28

Finding the Fourth Proportional to 20,678.68, 28,536.66 and 11,247.28

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Solution

The fourth proportional to 20,678.68, 28,536.66 and 11,247.28 is: 15,521.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.68 : 28,536.66 = 11,247.28 : x
  2. Step 2: Convert to fraction form
    20,678.68/28,536.66 = 11,247.28/x
  3. Step 3: Cross multiply
    20,678.68x = 28,536.66 × 11,247.28
  4. Step 4: Simplify right side
    20,678.68x = 320,959,805.28
  5. Step 5: Solve for x
    x = 320,959,805.28/20,678.68
  6. Step 6: Final answer
    x = 15,521.29

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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.