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Finding the Fourth Proportional to 18,730.76, 28,106.96 and 10,410.08

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Solution

The fourth proportional to 18,730.76, 28,106.96 and 10,410.08 is: 15,621.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,730.76 : 28,106.96 = 10,410.08 : x
  2. Step 2: Convert to fraction form
    18,730.76/28,106.96 = 10,410.08/x
  3. Step 3: Cross multiply
    18,730.76x = 28,106.96 × 10,410.08
  4. Step 4: Simplify right side
    18,730.76x = 292,595,509.57
  5. Step 5: Solve for x
    x = 292,595,509.57/18,730.76
  6. Step 6: Final answer
    x = 15,621.13

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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.