Home / 20,930.37-28,867.21-13,767.64

Finding the Fourth Proportional to 20,930.37, 28,867.21 and 13,767.64

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Solution

The fourth proportional to 20,930.37, 28,867.21 and 13,767.64 is: 18,988.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.37 : 28,867.21 = 13,767.64 : x
  2. Step 2: Convert to fraction form
    20,930.37/28,867.21 = 13,767.64/x
  3. Step 3: Cross multiply
    20,930.37x = 28,867.21 × 13,767.64
  4. Step 4: Simplify right side
    20,930.37x = 397,433,248.50
  5. Step 5: Solve for x
    x = 397,433,248.50/20,930.37
  6. Step 6: Final answer
    x = 18,988.35

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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.