Home / 20,634.72-28,476.28-11,203.28

Finding the Fourth Proportional to 20,634.72, 28,476.28 and 11,203.28

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Solution

The fourth proportional to 20,634.72, 28,476.28 and 11,203.28 is: 15,460.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,634.72 : 28,476.28 = 11,203.28 : x
  2. Step 2: Convert to fraction form
    20,634.72/28,476.28 = 11,203.28/x
  3. Step 3: Cross multiply
    20,634.72x = 28,476.28 × 11,203.28
  4. Step 4: Simplify right side
    20,634.72x = 319,027,738.20
  5. Step 5: Solve for x
    x = 319,027,738.20/20,634.72
  6. Step 6: Final answer
    x = 15,460.73

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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.