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Finding the Fourth Proportional to 20,754, 28,640.75 and 11,322.77

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Solution

The fourth proportional to 20,754, 28,640.75 and 11,322.77 is: 15,625.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754 : 28,640.75 = 11,322.77 : x
  2. Step 2: Convert to fraction form
    20,754/28,640.75 = 11,322.77/x
  3. Step 3: Cross multiply
    20,754x = 28,640.75 × 11,322.77
  4. Step 4: Simplify right side
    20,754x = 324,292,425.06
  5. Step 5: Solve for x
    x = 324,292,425.06/20,754
  6. Step 6: Final answer
    x = 15,625.54

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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.