Home / 20,801.41-28,709.17-13,251.06

Finding the Fourth Proportional to 20,801.41, 28,709.17 and 13,251.06

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Solution

The fourth proportional to 20,801.41, 28,709.17 and 13,251.06 is: 18,288.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.41 : 28,709.17 = 13,251.06 : x
  2. Step 2: Convert to fraction form
    20,801.41/28,709.17 = 13,251.06/x
  3. Step 3: Cross multiply
    20,801.41x = 28,709.17 × 13,251.06
  4. Step 4: Simplify right side
    20,801.41x = 380,426,901.09
  5. Step 5: Solve for x
    x = 380,426,901.09/20,801.41
  6. Step 6: Final answer
    x = 18,288.52

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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.