Home / 18,730.16-28,119.64-12,530

Finding the Fourth Proportional to 18,730.16, 28,119.64 and 12,530

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Solution

The fourth proportional to 18,730.16, 28,119.64 and 12,530 is: 18,811.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,730.16 : 28,119.64 = 12,530 : x
  2. Step 2: Convert to fraction form
    18,730.16/28,119.64 = 12,530/x
  3. Step 3: Cross multiply
    18,730.16x = 28,119.64 × 12,530
  4. Step 4: Simplify right side
    18,730.16x = 352,339,089.20
  5. Step 5: Solve for x
    x = 352,339,089.20/18,730.16
  6. Step 6: Final answer
    x = 18,811.32

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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.