Home / 20,537.55-28,346.22-12,979.08

Finding the Fourth Proportional to 20,537.55, 28,346.22 and 12,979.08

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Solution

The fourth proportional to 20,537.55, 28,346.22 and 12,979.08 is: 17,913.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,537.55 : 28,346.22 = 12,979.08 : x
  2. Step 2: Convert to fraction form
    20,537.55/28,346.22 = 12,979.08/x
  3. Step 3: Cross multiply
    20,537.55x = 28,346.22 × 12,979.08
  4. Step 4: Simplify right side
    20,537.55x = 367,907,857.08
  5. Step 5: Solve for x
    x = 367,907,857.08/20,537.55
  6. Step 6: Final answer
    x = 17,913.91

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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.