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Finding the Fourth Proportional to 18,929.92, 28,392.96 and 5,080.32

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Solution

The fourth proportional to 18,929.92, 28,392.96 and 5,080.32 is: 7,619.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,929.92 : 28,392.96 = 5,080.32 : x
  2. Step 2: Convert to fraction form
    18,929.92/28,392.96 = 5,080.32/x
  3. Step 3: Cross multiply
    18,929.92x = 28,392.96 × 5,080.32
  4. Step 4: Simplify right side
    18,929.92x = 144,245,322.55
  5. Step 5: Solve for x
    x = 144,245,322.55/18,929.92
  6. Step 6: Final answer
    x = 7,619.96

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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.