Home / 20,531.91-28,334.03-11,100.47

Finding the Fourth Proportional to 20,531.91, 28,334.03 and 11,100.47

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Solution

The fourth proportional to 20,531.91, 28,334.03 and 11,100.47 is: 15,318.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.91 : 28,334.03 = 11,100.47 : x
  2. Step 2: Convert to fraction form
    20,531.91/28,334.03 = 11,100.47/x
  3. Step 3: Cross multiply
    20,531.91x = 28,334.03 × 11,100.47
  4. Step 4: Simplify right side
    20,531.91x = 314,520,852.82
  5. Step 5: Solve for x
    x = 314,520,852.82/20,531.91
  6. Step 6: Final answer
    x = 15,318.64

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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.