Home / 20,467.61-28,242.77-12,911.09

Finding the Fourth Proportional to 20,467.61, 28,242.77 and 12,911.09

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Solution

The fourth proportional to 20,467.61, 28,242.77 and 12,911.09 is: 17,815.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,467.61 : 28,242.77 = 12,911.09 : x
  2. Step 2: Convert to fraction form
    20,467.61/28,242.77 = 12,911.09/x
  3. Step 3: Cross multiply
    20,467.61x = 28,242.77 × 12,911.09
  4. Step 4: Simplify right side
    20,467.61x = 364,644,804.11
  5. Step 5: Solve for x
    x = 364,644,804.11/20,467.61
  6. Step 6: Final answer
    x = 17,815.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.