Home / 20,836.47-28,753.60-11,886.87

Finding the Fourth Proportional to 20,836.47, 28,753.60 and 11,886.87

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Solution

The fourth proportional to 20,836.47, 28,753.60 and 11,886.87 is: 16,403.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.47 : 28,753.60 = 11,886.87 : x
  2. Step 2: Convert to fraction form
    20,836.47/28,753.60 = 11,886.87/x
  3. Step 3: Cross multiply
    20,836.47x = 28,753.60 × 11,886.87
  4. Step 4: Simplify right side
    20,836.47x = 341,790,305.23
  5. Step 5: Solve for x
    x = 341,790,305.23/20,836.47
  6. Step 6: Final answer
    x = 16,403.46

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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.