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Finding the Fourth Proportional to 20,754.87, 28,672.95 and 13,601.79

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Solution

The fourth proportional to 20,754.87, 28,672.95 and 13,601.79 is: 18,790.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754.87 : 28,672.95 = 13,601.79 : x
  2. Step 2: Convert to fraction form
    20,754.87/28,672.95 = 13,601.79/x
  3. Step 3: Cross multiply
    20,754.87x = 28,672.95 × 13,601.79
  4. Step 4: Simplify right side
    20,754.87x = 390,003,444.58
  5. Step 5: Solve for x
    x = 390,003,444.58/20,754.87
  6. Step 6: Final answer
    x = 18,790.94

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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.