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Finding the Fourth Proportional to 15,078.56, 20,671.08 and 14,836.64

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Solution

The fourth proportional to 15,078.56, 20,671.08 and 14,836.64 is: 20,339.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,078.56 : 20,671.08 = 14,836.64 : x
  2. Step 2: Convert to fraction form
    15,078.56/20,671.08 = 14,836.64/x
  3. Step 3: Cross multiply
    15,078.56x = 20,671.08 × 14,836.64
  4. Step 4: Simplify right side
    15,078.56x = 306,689,372.37
  5. Step 5: Solve for x
    x = 306,689,372.37/15,078.56
  6. Step 6: Final answer
    x = 20,339.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.