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Finding the Fourth Proportional to 18,977.76, 28,471.08 and 6,497.92

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Solution

The fourth proportional to 18,977.76, 28,471.08 and 6,497.92 is: 9,748.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,977.76 : 28,471.08 = 6,497.92 : x
  2. Step 2: Convert to fraction form
    18,977.76/28,471.08 = 6,497.92/x
  3. Step 3: Cross multiply
    18,977.76x = 28,471.08 × 6,497.92
  4. Step 4: Simplify right side
    18,977.76x = 185,002,800.15
  5. Step 5: Solve for x
    x = 185,002,800.15/18,977.76
  6. Step 6: Final answer
    x = 9,748.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.