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Finding the Fourth Proportional to 18,937.60, 28,406.28 and 5,789.92

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Solution

The fourth proportional to 18,937.60, 28,406.28 and 5,789.92 is: 8,684.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.60 : 28,406.28 = 5,789.92 : x
  2. Step 2: Convert to fraction form
    18,937.60/28,406.28 = 5,789.92/x
  3. Step 3: Cross multiply
    18,937.60x = 28,406.28 × 5,789.92
  4. Step 4: Simplify right side
    18,937.60x = 164,470,088.70
  5. Step 5: Solve for x
    x = 164,470,088.70/18,937.60
  6. Step 6: Final answer
    x = 8,684.84

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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.